Prof. Gerd P. Weigelt Profile

Prof. Gerd P. Weigelt

Director and Scientific Member at Max Planck Institut fur Radioastronomie

SPIE Involvement:

Author

Publications (95)

Proceedings Article | 3 September 2024 Presentation + Paper

Presentation + Paper

MATISSE, the VLTI mid-infrared spectro-interferometric imager: achievements and perspectives

Romain Petrov, Stéphane Lagarde, Bruno Lopez, Sylvie Robbe-Dubois, James Leftley, Claudia Paladini, Mathis Houllé, Gerd Weigelt, Roy van Boekel, Walter Jaffe, Julien Woillez, Philippe Berio, Felix Bettonvil, Pierre Bourget, Eddy Eldswijk, Alexis Matter, Anthony Meilland, Florentin Millour, Laurent Pallanca, Thomas Rivinius, Gérard Zins

Proceedings Volume 13095, 130950C (2024) https://doi.org/10.1117/12.3019899

KEYWORDS: Equipment, Mid infrared, Spectral resolution, Stars, Sensors, Observatories, Imaging systems, Telescopes, Stellar interferometry, Optical path differences

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Proceedings Article | 26 August 2022 Presentation + Paper

Presentation + Paper

MATISSE, the VLTI mid-infrared imaging spectro-interferometer at the time of the first published astrophysical results

Stéphane Lagarde, Anthony Meilland, Bruno Lopez, Romain Petrov, Fatmé Allouche, Alexis Matter, Jean-Charles Augereau, Phillippe Berio, Felix Bettonvil, Roy van Boekel, Paul Bristow, Pierre Cruzalèbes, William Danchi, Andreas Glindemann, Massinissa Hadjara, Mathias Henninger, Michiel Hogerheijde, Walter Jaffe, James Leftley, Michael Lehmitz, Florentin Millour, Claudia Paladini, Eric Pantin, Miguel Riquelme, Thomas Rivinius, Sylvie Robbe-Dubois, Markus Schoeller, Jozsef Varga, Gerd Weigelt, Julien Woillez, Gérard Zins

Proceedings Volume 12183, 121830A (2022) https://doi.org/10.1117/12.2630164

KEYWORDS: Stars, Mid-IR, Spectral resolution, Telescopes, Visibility, Sensors, Observatories, Atmospheric optics, Astatine, Planets

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Proceedings Article | 9 July 2018 Paper

Paper

MATISSE: performance in laboratory, results of AIV in Paranal, and first results on sky

S. Robbe-Dubois, S. Lagarde, P. Antonelli, B. Lopez, F. Allouche, C. Bailet, Ph. Berio, Y. Bresson, J.-M. Clausse, P. Cruzalèbes, Y. Fantei-Caujolle, A. Marcotto, A. Matter, A. Meilland, F. Millour, S. Morel, R. Petrov, S. Rousseau, A. Soulain, G. Zins, M. Lehmitz, W. Laun, T. Adler, R. Klein, T. Maurer, F. Bettonvil, E. Eldswick, U. Beckmann, M. Heininger, P. Bristow, A. Glindemann, N. Hubin, L. Jochum, Th. Rivinus, M. Schoeller, J. Beltran, P. Bourget, A. Gallenne, Th. Guerlet, X. Haubois, D. Ives, G. Jakob, A. Meister, M. Riquelme, N. Schuhler, C. Stephan, P. Toledo, K. Tristam, J. Woillez, U. Neumann, A. Chelli, F. Guitton, K. Meisenheimer, B. Pichon, A. Spang, J. Varga, Th. Henning, W. Jaffe, L. Pasquini, Ph. Stee, G. Weigelt

Proceedings Volume 10701, 107010H (2018) https://doi.org/10.1117/12.2313270

KEYWORDS: L band, Photovoltaics, Spectral resolution, Visibility, Sensors, Interferometry, Astatine, Spatial filters, Telescopes, Calibration

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MATISSE (Multi AperTure mid-Infrared SpectroScopic Experiment) is the spectro-interferometer for the VLTI of the European Southern Observatory (ESO), operating in the L-, M- and N- spectral bands, and combining up to four beams from the unit or the auxiliary telescopes (UTs or ATs). MATISSE will offer new breakthroughs in the study of circumstellar environments by allowing the mapping of the material distribution, the gas and essentially the dust. The instrument consists in a warm optical system (WOP) accepting four beams from the VLTI and relaying them after a spectral splitting to cold optical benches (COB) located in two separate cryostats, one in L-M- band, and one in N-band. The test plan of the complete instrument has been conducted at the Observatoire de la Côte d’Azur in order to confirm the compliance of the performance with the high-level requirements. MATISSE has successfully passed the Preliminary Acceptance in Europe the 12th September 2017. Following this result, ESO gave approval for the instrument to be shipped to Paranal. The Alignment, Integration and Verification phase was conducted until end of February 2018, at the end of which first observations on sky have been performed to test the operations with the VLTI and to obtain first stellar light. The two first runs of the commissioning followed, respectively in March and in May 2018. It has the goal to optimize the MATISSE-VLTI communication, the acquisition procedures and the interface parameters. The observations were performed on bright L-M- and N- stars, with four ATs located on short baselines and UTs. The limit magnitudes will be deduced.

This paper reports on the performance of the instrument measured in laboratory (results of test plan in Nice and AIV in Paranal) in terms of spectral coverage, dispersion laws and spectral resolutions, and transfer function analysis: instrumental contrast, visibility accuracy, accuracy of the differential phase, of the closure-phase and of the differential visibility. It also provides results of the first tests on sky and the planning of the on-going commissioning.

Proceedings Article | 9 July 2018 Paper

Paper

Planet formation imager: project update

John Monnier, Michael Ireland, Stefan Kraus, Almudena Alonso-Herrero, Amy Bonsor, Fabien Baron, Amelia Bayo, Jean-Philippe Berger, Tabetha Boyajian, Andrea Chiavassa, David Ciardi, Michelle Creech-Eakman, Willem-Jan de Wit, Denis Defrère, Ruobing Dong, Gaspard Duchêne, Catherine Espaillat, Alexandre Gallenne, Poshak Gandhi, Jean-Francois Gonzalez, Chris Haniff, Sebastian Hoenig, John Ilee, Andrea Isella, Eric Jensen, Attila Juhasz, Stephen Kane, Makoto Kishimoto, Wilhelm Kley, Quentin Kral, Kaitlin Kratter, Lucas Labadie, Sylvestre Lacour, Greg Laughlin, Jean-Baptiste Le Bouquin, Ernest Michael, Farzana Meru, Rafael Millan-Gabet, Florentin Millour, Stefano Minardi, Alessandro Morbidelli, Chris Mordasini, Andreas Morlok, Dave Mozurkewich, Richard Nelson, Johan Olofsson, Rene Oudmaijer, Chris Packham, Claudia Paladini, Olja Panic, Romain Petrov, Benjamin Pope, Joerg-Uwe Pott, Luis Henry Quiroga-Nunez, Cristina Ramos Almeida, Sean Raymond, Zsolt Regaly, Mark Reynolds, Stephen Ridgway, Stephen Rinehart, Matthias Schreiber, Michael Smith, Keivan Stassun, Jean Surdej, Theo ten Brummelaar, Konrad Tristram, Neal Turner, Peter Tuthill, Gerard van Belle, Gautum Vasisht, Alexander Wallace, Gerd Weigelt, Edward Wishnow, Markus Wittkowski, Sebastian Wolf, John Young, Ming Zhao, Zhaohuan Zhu, Sebastian Zúñiga-Fernández

Proceedings Volume 10701, 1070118 (2018) https://doi.org/10.1117/12.2312683

KEYWORDS: Planets, Telescopes, Space telescopes, Exoplanets, Stars, Mid-IR, Interferometry, Signal to noise ratio, Interferometers, Heterodyning

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Proceedings Article | 9 July 2018 Presentation + Paper

Presentation + Paper

The installation and ongoing commissioning of the MATISSE mid-infrared interferometer at the ESO Very Large Telescope Observatory

B. Lopez, S. Lagarde, A. Matter, T. Agocs, F. Allouche, P. Antonelli, J.-C. Augereau, C. Bailet, P. Berio, F. Bettonvil, U. Beckmann, R. van Boekel, Y. Bresson, P. Bristow, P. Cruzalebes, M. Delbo, C. Dominik, E. Elswijk, Y. Fantei, A. Glindemann, M. Heininger, K.-H. Hofmann, M. Hogerheijde, J. Hron, W. Jaffe, G. Kroes, W. Laun, M. Lehmitz, A. Meilland, K. Meisenheimer, F. Millour, S. Morel, U. Neumann, E. Pantin, R. Petrov, S. Robbe-Dubois, D. Schertl, M. Schoeller, S. Wolf, G. Zins, T. Henning, Ph. Stee, G. Weigelt

Proceedings Volume 10701, 107010Z (2018) https://doi.org/10.1117/12.2313388

KEYWORDS: Interferometry, Spectral resolution, Sensors, Mid-IR, Visibility, Stars, Imaging systems, Interferometers, Photometry, Observatories

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Proceedings Article | 4 August 2016 Paper

Paper

Planet Formation Imager (PFI): science vision and key requirements

Stefan Kraus, John Monnier, Michael Ireland, Gaspard Duchêne, Catherine Espaillat, Sebastian Hönig, Attila Juhasz, Chris Mordasini, Johan Olofsson, Claudia Paladini, Keivan Stassun, Neal Turner, Gautam Vasisht, Tim Harries, Matthew Bate, Jean-François Gonzalez, Alexis Matter, Zhaohuan Zhu, Olja Panic, Zsolt Regaly, Alessandro Morbidelli, Farzana Meru, Sebastian Wolf, John Ilee, Jean-Philippe Berger, Ming Zhao, Quentin Kral, Andreas Morlok, Amy Bonsor, David Ciardi, Stephen Kane, Kaitlin Kratter, Greg Laughlin, Joshua Pepper, Sean Raymond, Lucas Labadie, Richard Nelson, Gerd Weigelt, Theo ten Brummelaar, Arnaud Pierens, Rene Oudmaijer, Wilhelm Kley, Benjamin Pope, Eric L. Jensen, Amelia Bayo, Michael Smith, Tabetha Boyajian, Luis Henry Quiroga-Nuñez, Rafael Millan-Gabet, Andrea Chiavassa, Alexandre Gallenne, Mark Reynolds, Willem-Jan de Wit, Markus Wittkowski, Florentin Millour, Poshak Gandhi, Cristina Ramos Almeida, Almudena Alonso Herrero, Chris Packham, Makoto Kishimoto, Konrad R. Tristram, Jörg-Uwe Pott, Jean Surdej, David Buscher, Chris Haniff, Sylvestre Lacour, Romain Petrov, Steve Ridgway, Peter Tuthill, Gerard van Belle, Phil Armitage, Clement Baruteau, Myriam Benisty, Bertram Bitsch, Sijme-Jan Paardekooper, Christophe Pinte, Frederic Masset, Giovanni Rosotti

Proceedings Volume 9907, 99071K (2016) https://doi.org/10.1117/12.2231067

KEYWORDS: Planets, Imaging systems, Exoplanets, Planetary systems, Astrophysics, Stars, Astronomy, Theoretical astronomy, Observatories, Physics

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Proceedings Article | 4 August 2016 Paper

Paper

The 2016 interferometric imaging beauty contest

J. Sanchez-Bermudez, E. Thiébaut, K.-H. Hofmann, M. Heininger, D. Schertl, G. Weigelt, F. Millour, A. Schutz, A. Ferrari, M. Vannier, D. Mary, J. Young

Proceedings Volume 9907, 99071D (2016) https://doi.org/10.1117/12.2231982

KEYWORDS: Image restoration, Interferometry, Optical interferometry, Image restoration, Reconstruction algorithms, Device simulation, Stars, Visibility, Image quality, Image processing, Spatial frequencies

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Proceedings Article | 4 August 2016 Paper

Paper

An overview of the mid-infrared spectro-interferometer MATISSE: science, concept, and current status

A. Matter, B. Lopez, P. Antonelli, M. Lehmitz, F. Bettonvil, U. Beckmann, S. Lagarde, W. Jaffe, R. Petrov, P. Berio, F. Millour, S. Robbe-Dubois, A. Glindemann, P. Bristow, M. Schoeller, T. Lanz, T. Henning, G. Weigelt, M. Heininger, S. Morel, P. Cruzalebes, K. Meisenheimer, R. Hofferbert, S. Wolf, Y. Bresson, T. Agocs, F. Allouche, J.-C. Augereau, G. Avila, C. Bailet, J. Behrend, G. van Belle, J.-P. Berger, R. van Boekel, P. Bourget, R. Brast, J.-M. Clausse, C. Connot, R. Conzelmann, G. Csepany, W. Danchi, M. Delbo, C. Dominik, A. van Duin, E. Elswijk, Y. Fantei, G. Finger, A. Gabasch, F. Gonté, U. Graser, F. Guitton, S. Guniat, M. De Haan, P. Haguenauer, H. Hanenburg, K.-H. Hofmann, M. Hogerheijde, R. ter Horst, J. Hron, C Hummel, J. Isderda, D. Ives, G. Jakob, A. Jasko, P. Jolley, S. Kiraly, J. Kragt, T. Kroener, G. Kroes, S. Kuindersma, L. Labadie, W. Laun, C. Leinert, J.-L. Lizon, C. Lucuix, A. Marcotto, F. Martinache, G. Martinot-Lagarde, N. Mauclert, L. Mehrgan, A. Meilland, M. Mellein, S. Menardi, A. Merand, U. Neumann, E. Nussbaum, S. Ottogalli, R. Palsa, J. Panduro, E. Pantin, I. Percheron, T. Phan Duc, J.-U. Pott, E. Pozna, R. Roelfsema, G. Rupprecht, D. Schertl, C. Schmidt, M. Schuil, A. Spang, J. Stegmeier, N. Tromp, F. Vakili, M. Vannier, K. Wagner, L. Venema, J. Woillez

Proceedings Volume 9907, 99070A (2016) https://doi.org/10.1117/12.2233052

KEYWORDS: Mid-IR, Interferometry, Telescopes, Signal detection, Sensors, Stars, Spectral resolution, Fourier transforms, L band, Cameras

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Proceedings Article | 4 August 2016 Paper

Paper

Imaging capabilities of the VLTI/MATISSE spectro-interferometric instrument

J. Sanchez-Bermudez, J.-U. Pott, R. van Boekel, T. Henning, F. Baron, A. Matter, B. Lopez, F. Millour, G. Weigelt, K.-H. Hofmann, D. Schertl

Proceedings Volume 9907, 99070B (2016) https://doi.org/10.1117/12.2232308

KEYWORDS: Image restoration, Interferometry, Interferometers, Mid-IR, Visibility, Image processing, Spatial frequencies, Data modeling, Image quality, Signal to noise ratio

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Proceedings Article | 4 August 2016 Paper

Paper

Grown-up stars physics with MATISSE

F. Millour, J. Hron, A. Chiavassa, G. Weigelt, A. Soulain, Z. Khorrami, A. Meilland, N. Nardetto, C. Paladini, A. Domiciano de Souza, G. Niccolini, K.-H. Hofmann, D. Schertl, P. Stee, P. Bendjoya, F. Thévenin, F. Vakili, P. Berio, T. Lanz, A. Matter, P. Cruzalèbes, R. Petrov, B. Lopez

Proceedings Volume 9907, 99073Q (2016) https://doi.org/10.1117/12.2232350

KEYWORDS: Stars, Physics, Image restoration, Stars, Physics, Image restoration, Infrared radiation, Interferometry, Visible radiation, K band, Beryllium, Adaptive optics, Spectroscopy

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Proceedings Article | 4 August 2016 Paper

Paper

Data reduction for the MATISSE instrument

F. Millour, P. Berio, M. Heininger, K.-H. Hofmann, D. Schertl, G. Weigelt, F. Guitton, W. Jaffe, U. Beckmann, R. Petrov, F. Allouche, S. Robbe-Dubois, S. Lagarde, A. Soulain, A. Meilland, A. Matter, P. Cruzalèbes, B. Lopez

Proceedings Volume 9907, 990723 (2016) https://doi.org/10.1117/12.2232283

KEYWORDS: Modulation, Calibration, Sensors, Visibility, Interferometry, Telescopes, Distortion, Space telescopes, Atmospheric optics, Colorimetry

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Proceedings Article | 26 July 2016 Paper

Paper

Science with MATISSE

Sebastian Wolf, Bruno Lopez, Jean-Charles Augereau, Marco Delbo, Carsten Dominik, Thomas Henning, Karl-Heinz Hofmann, Michiel Hogerheijde, Josef Hron, Walter Jaffe, Thierry Lanz, Klaus Meisenheimer, Florentin Millour, Eric Pantin, Roman Petrov, Dieter Schertl, Roy van Boekel, Gerd Weigelt, Andrea Chiavassa, Attila Juhasz, Alexis Matter, Anthony Meilland, Nicolas Nardetto, Claudia Paladini

Proceedings Volume 9907, 99073S (2016) https://doi.org/10.1117/12.2232835

KEYWORDS: Stars, Mid-IR, Spectral resolution, Interferometry, Asteroids, Visibility, Planets, Binary data, Carbon monoxide, Spatial resolution

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Proceedings Article | 26 July 2016 Paper

Paper

Image reconstruction method IRBis for optical/infrared long-baseline interferometry

Karl-Heinz Hofmann, Matthias Heininger, Dieter Schertl, Gerd Weigelt, Florentin Millour, Philippe Berio

Proceedings Volume 9907, 99073H (2016) https://doi.org/10.1117/12.2232369

KEYWORDS: Image restoration, Data modeling, Interferometry, Visibility, Binary data, Image quality, Reconstruction algorithms, Phase measurement, Computer simulations, Image processing

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IRBis is an image reconstruction method for optical/infrared long-baseline interferometry. IRBis can reconstruct images from (a) measured visibilities and closure phases, or from (b) measured complex visibilities (i.e. the Fourier phases and visibilities). The applied optimization routine ASA CG is based on conjugate gradients. The method allows the user to implement different regularizers, as for example, maximum entropy, smoothness, total variation, etc., and apply residual ratios as an additional metric for goodness-of-fit. In addition, IRBis allows the user to change the following reconstruction parameters: (a) FOV of the area to be reconstructed, (b) the size of the pixel-grid used, (c) size of a binary mask in image space allowing reconstructed intensities < 0 within the binary mask only, (d) the strength of the regularization, etc. The two main reconstruction parameters are the size of the binary mask in image space (c) and the strength of the regularization (d). Several values of these two parameters are tested within the algorithm. The quality of the different reconstructions obtained is roughly estimated by evaluation of the differences between the measured data and the reconstructed image (using the reduced χ² values and the residual ratios). The best-quality reconstruction and a few reconstructions sorted according to their quality are provided to the user as resulting reconstructions. We describe the theory of IRBis and will present several applications to simulated interferometric data and data of real astronomical objects: (a) We have investigated image reconstruction experiments of MATISSE target candidates by computer simulations. We have modeled gaps in a disk of a young stellar object and have simulated interferometric data (squared visibilities and closure phases) with a signal-to-noise ratio as expected for MATISSE observations. We have performed image reconstruction experiments with this model for different flux levels of the target and different amount of observing time, that is, with different uv coverages. As expected, the quality of the reconstructions clearly depends on the flux of the source and the completeness of the uv coverage. (b) We also discuss reconstructions of the Luminous Blue Variable η Carinae obtained from AMBER observations in the high spectral resolution mode in the K band. The images were reconstruction (1) using the closure phases and (2) using the absolute phases derived from the measured wavelength-differential phases and the closure phase reconstruction in the continuum.

Proceedings Article | 24 July 2014 Paper

Paper

A low-noise HAWAII detector system and new cold optics for the CLASSIC/CLIMB beam combiner instrument of the CHARA array

Udo Beckmann, Claus Connot, Matthias Heininger, Karl-Heinz Hofmann, Eddy Nußbaum, Dieter Schertl, Walter Solscheid, Theo ten Brummelaar, Nils Turner, Gerd Weigelt

Proceedings Volume 9146, 91461W (2014) https://doi.org/10.1117/12.2055850

KEYWORDS: Sensors, Electronics, Staring arrays, Analog electronics, Digital filtering, Prisms, Signal processing, Radio astronomy, Signal detection, Electrons

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Proceedings Article | 24 July 2014 Paper

Paper

The LINC-NIRVANA Fizeau interferometric imager: final lab integration, first light experiments and challenges

T. Herbst, R. Ragazzoni, A. Eckart, G. Weigelt

Proceedings Volume 9146, 91460I (2014) https://doi.org/10.1117/12.2055495

KEYWORDS: Interferometry, Telescopes, Stars, Imaging systems, Sensors, Adaptive optics, Mirrors, Cameras, Cryogenics, Wavefront sensors

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Proceedings Article | 24 July 2014 Paper

Paper

The 2014 interferometric imaging beauty contest

John Monnier, Jean-Philippe Berger, Jean-Baptiste Le Bouquin, Peter Tuthill, Markus Wittkowski, Rebekka Grellmann, André Müller, Sridhar Renganswany, Christian Hummel, Karl-Heinz Hofmann, Dieter Schertl, Gerd Weigelt, John Young, David Buscher, Joel Sanchez-Bermudez, Antxon Alberdi, Rainer Schoedel, Rainer Köhler, Ferréol Soulez, Éric Thiébaut, Jacques Kluska, Fabien Malbet, Gilles Duvert, Stefan Kraus, Brian Kloppenborg, Fabien Baron, Willem-Jan de Wit, Thomas Rivinius, Antoine Merand

Proceedings Volume 9146, 91461Q (2014) https://doi.org/10.1117/12.2057312

KEYWORDS: Stars, Image restoration, Interferometry, Image processing, Visibility, Reconstruction algorithms, Telescopes, Data modeling, Spatial resolution, Optical interferometry

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Proceedings Article | 24 July 2014 Paper

Paper

Fizeau interferometric imaging of Io volcanism with LBTI/LMIRcam

J. Leisenring, P. Hinz, M. Skrutskie, A. Skemer, C. Woodward, C. Veillet, C. Arcidiacono, V. Bailey, M. Bertero, P. Boccacci, A. Conrad, K. de Kleer, I. de Pater, D. Defrère, J. Hill, K.-H. Hofmann, L. Kaltenegger, A. La Camera, M. Nelson, D. Schertl, J. Spencer, G. Weigelt, J. Wilson

Proceedings Volume 9146, 91462S (2014) https://doi.org/10.1117/12.2057290

KEYWORDS: Information operations, Point spread functions, Interferometry, Telescopes, Deconvolution, Reconstruction algorithms, Spatial resolution, Image restoration, Mirrors, Image resolution

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Proceedings Article | 24 July 2014 Paper

Paper

HD 139614: the interferometric case for a group-Ib pre-transitional young disk

Lucas Labadie, Alexis Matter, Alexander Kreplin, Bruno Lopez, Sebastian Wolf, Gerd Weigelt, Steve Ertel, Jean-Philippe Berger, Jorg-Uwe Pott, William Danchi

Proceedings Volume 9146, 91462T (2014) https://doi.org/10.1117/12.2055353

KEYWORDS: Visibility, Stars, Surface conduction electron emitter displays, Mid-IR, Interferometry, Data modeling, Radiative transfer, Silicates, Calibration, Infrared radiation

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Proceedings Article | 24 July 2014 Paper

Paper

MATISSE status report and science forecast

B. Lopez, S. Lagarde, W. Jaffe, R. Petrov, M. Schöller, P. Antonelli, U. Beckman, Ph. Bério, F. Bettonvil, U. Graser, F. Millour, S. Robbe-Dubois, L. Venema, S. Wolf, P. Bristow, A. Glindemann, J.-C. Gonzalez, Th. Lanz, T. Henning, G. Weigelt, T. Agócs, J.-C. Augereau, G. Ávila, C. Bailet, J. Behrend, J.-P. Berger, Roy von Boekel, S. Bonhomme, P. Bourget, R. Brast, Y. Bresson, J. Clausse, O. Chesneau, G. Csépány, C. Connot, A. Crida, W. Danchi, M. Delbo , F. Delplancke, C. Dominik, M. Dugué, E. Elswijk, Y. Fanteï, G. Finger, A. Gabasch, P. Girard, V. Girault, P. Gitton, A. Glazenborg, F. Gonté, F. Guitton, S. Guniat, M. De Haan, P. Haguenauer, H. Hanenburg, M. Heininger, K.-H. Hofmann, M. Hogerheijde, R. ter Horst, J. Hron, Y. Hughes, D. Ives, G. Jakob, A. Jaskó, P. Jolley, J. Kragt, R. Köhler, T. Kroener, G. Kroes, L. Labadie, W. Laun, M. Lehmitz, Ch. Leinert, J. Lizon, Ch. Lucuix, A. Marcotto, F. Martinache, A. Matter, G. Martinot-Lagarde, N. Mauclert, L. Mehrgan, A. Meilland, M. Mellein, S. Ménardi, J. Menut, K. Meisenheimer, S. Morel, L. Mosoni, R. Navarro, U. Neumann, E. Nussbaum, S. Ottogalli, R. Palsa, J. Panduro, E. Pantin, I. Percheron, T. Phan Duc, J.-U. Pott, Eszter Pozna, F. Przygodda, A. Richichi, F. Rigal, G. Rupprecht, D. Schertl, J. Stegmeier, L. Thiam, N. Tromp, M. Vannier, F. Vakili, G. van Belle, K. Wagner, J. Woillez

Proceedings Volume 9146, 91460M (2014) https://doi.org/10.1117/12.2056419

KEYWORDS: Interferometry, Sensors, Mid-IR, Stars, Telescopes, Visibility, Planets, Spectral resolution, Photometry, Fourier transforms

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Proceedings Article | 21 July 2014 Paper

Paper

High contrast imaging at the LBT: the LEECH exoplanet imaging survey

Andrew Skemer, Philip Hinz, Simone Esposito, Michael Skrutskie, Denis Defrère, Vanessa Bailey, Jarron Leisenring, Daniel Apai, Beth Biller, Mickaël Bonnefoy, Wolfgang Brandner, Esther Buenzli, Laird Close, Justin Crepp, Robert De Rosa, Silvano Desidera, Josh Eisner, Jonathan Fortney, Thomas Henning, Karl-Heinz Hofmann, Taisiya Kopytova, Anne-Lise Maire, Jared Males, Rafael Millan-Gabet, Katie Morzinski, Apurva Oza, Jenny Patience, Abhijith Rajan, George Rieke, Dieter Schertl, Joshua Schlieder, Kate Su, Amali Vaz, Kimberly Ward-Duong, Gerd Weigelt, Charles Woodward, Neil Zimmerman

Proceedings Volume 9148, 91480L (2014) https://doi.org/10.1117/12.2057277

KEYWORDS: Planets, Stars, Exoplanets, Telescopes, Adaptive optics, Imaging systems, Mirrors, Cameras, Wavefront sensors, Interferometers

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Proceedings Article | 8 July 2014 Paper

Paper

The LINC-NIRVANA high resolution imager: challenges from the lab to first light

T. Herbst, R. Ragazzoni, A. Eckart, G. Weigelt

Proceedings Volume 9147, 91471M (2014) https://doi.org/10.1117/12.2055467

KEYWORDS: Telescopes, Imaging systems, Adaptive optics, Wavefront sensors, Stars, Interferometry, Image resolution, Calibration, Infrared telescopes, Infrared imaging

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SPIE Journal Paper | 6 February 2013

LINC-NIRVANA for the large binocular telescope: setting up the world’s largest near infrared binoculars for astronomy

Ralph Hofferbert, Harald Baumeister, Thomas Bertram, Jürgen Berwein, Peter Bizenberger, Armin Böhm, Michael Böhm, José Luis Borelli, Matthieu Brangier, Florian Briegel, Albert Conrad, Fulvio De Bonis, Roman Follert, Thomas Herbst, Armin Huber, Frank Kittmann, Martin Kürster, Werner Laun, Ulrich Mall, Daniel Meschke, Lars Mohr, Vianak Naranjo, Aleksei Pavlov, Jorg-Uwe Pott, Hans-Walter Rix, Ralf-Rainer Rohloff, Eva Schinnerer, Clemens Storz, Jan Trowitzsch, Zhaojun Yan, Xianyu Zhang, Andreas Eckart, Matthew Horrobin, Steffen Rost, Christian Straubmeier, Imke Wank, Jens Zuther, Udo Beckmann, Claus Connot, Matthias Heininger, Karl-Heinz Hofmann, Tim Kroner, Edmund Nussbaum, Dieter Schertl, Gerd Weigelt, Maria Bergomi, Alessandro Brunelli, Marco Dima, Jacopo Farinato, Demetrio Magrin, Luca Marafatto, Roberto Ragazzoni, Valentina Viotto, Carmelo Arcidiacono, Giovanni Bregoli, Paolo Ciliegi, Giuseppe Cosentino, Emiliano Diolaiti, Italo Foppiani, Matteo Lombini, Laura Schreiber, Francesco D'Alessio, Gianluca Li Causi, Dario Lorenzetti, Fabrizio Vitali, Mario Bertero, Patrizia Boccacci, Andrea La Camera

OE, Vol. 52, Issue 08, 081602, (February 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.8.081602

KEYWORDS: Telescopes, Sensors, Mirrors, Interferometry, Near infrared, Adaptive optics, Interfaces, Cameras, Optical engineering, Astronomy

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Proceedings Article | 24 October 2012 Paper

Paper

LINC-NIRVANA for the LBT: setting up the world's largest NIR binoculars for astronomy

Ralph Hofferbert, Harald Baumeister, Thomas Bertram, Jürgen Berwein, Peter Bizenberger, Armin Böhm, Michael Böhm, José Luis Borelli, Matthieu Brangier, Florian Briegel, Albert Conrad, Fulvio De Bonis, Roman Follert, Tom Herbst, Armin Huber, Frank Kittmann, Martin Kürster, Werner Laun, Ulrich Mall, Daniel Meschke, Lars Mohr, Vianak Naranjo, Aleksei Pavlov, Jörg-Uwe Pott, Hans-Walter Rix, Ralf-Rainer Rohloff, Eva Schinnerer, Clemens Storz, Jan Trowitzsch, Zhaojun Yan, Xianyu Zhang, Andreas Eckart, Matthew Horrobin, Steffen Rost, Christian Straubmeier, Imke Wank, Jens Zuther, Udo Beckmann, Claus Connot, Matthias Heininger, Karl-Heinz Hofmann, Tim Kröner, Eddy Nussbaum, Dieter Schertl, Gerd Weigelt, Maria Bergomi, Alessandro Brunelli, Marco Dima, Jacopo Farinato, Demetrio Magrin, Luca Marafatto, Roberto Ragazzoni, Valentina Viotto, Carmelo Arcidiacono, Giovanni Bregoli, Paolo Ciliegi, Guiseppe Cosentino, Emiliano Diolaiti, Italo Foppiani, Matteo Lombini, Laura Schreiber, Francesco D'Alessio, Gianluca Li Causi, Dario Lorenzetti, Fabrizio Vitali, Mario Bertero, Patrizia Boccacci, Andrea La Camera

Proceedings Volume 8511, 85110A (2012) https://doi.org/10.1117/12.928284

KEYWORDS: Telescopes, Mirrors, Sensors, Interferometry, Cameras, Adaptive optics, Near infrared, Stars, Imaging systems, Interfaces

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Proceedings Article | 12 September 2012 Paper

Paper

LINC-NIRVANA: assembly, integration, and verification update

T. Herbst, R. Ragazzoni, A. Eckart, G. Weigelt

Proceedings Volume 8445, 84450V (2012) https://doi.org/10.1117/12.926267

KEYWORDS: Adaptive optics, Stars, Telescopes, Sensors, Wavefronts, Mirrors, Neodymium, Cameras, Optical fabrication, Control systems

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Proceedings Article | 12 September 2012 Paper

Paper

The 2012 interferometric imaging beauty contest

Fabien Baron, William Cotton, Peter Lawson, Steve Ridgway, Alicia Aarnio, John Monnier, Karl-Heinz Hofmann, Dieter Schertl, Gerd Weigelt, Eric Thiébaut, Férréol Soulez, David Mary, Florentin Millour, Martin Vannier, John Young, Nicholas Elias, Henrique Schmitt, Sridharan Rengaswamy

Proceedings Volume 8445, 84451E (2012) https://doi.org/10.1117/12.924907

KEYWORDS: Visibility, Aluminium phosphide, Data modeling, Interferometry, Stars, Image restoration, Reconstruction algorithms, Infrared imaging, Signal to noise ratio, Spatial frequencies

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Proceedings Article | 12 September 2012 Paper

Paper

Perspective of imaging in the mid-infrared at the Very Large Telescope Interferometer

B. Lopez, S. Lagarde, P. Antonelli, W. Jaffe, R. Petrov, L. Venema, Sylvie Robbe-Dubois, F. Bettonvil, P. Berio, R. Navarro, U. Graser, U. Beckman, G. Weigelt, F. Vakili, T. Henning, J.-C. Gonzales, S. Wolf, C. Bailet, J. Behrend, Y. Bresson, O. Chesneau, J. Clausse, C. Connot, M. Dugué, Y. Fantei, E. Elswijk, H. Hanenburg, K. Hofmann, M. Heininger, R. ter Horst, J. Hron, J. Kragt, N. Tromp, T. Agocs, G. Kroes, W. Laun, Ch. Leinert, M. Lehmitz, A. Matter, J. Menut, F. Millour, U. Neumann, E. Nussbaum, S. Ottogalli, J.-U. Pott, F. Rigal, A. Roussel, D. Schertl, M. Vannier, K. Wagner, M. Mellein, T. Kroener, N. Mauclert, P. Girard, G. Lagarde, L. Mosoni, A. Jasko, A. Glindemann, T. Phan Duc, G. Finger, D. Ives, G. Jakob, I. Percheron, G. Avila, R. Palsa, Eszter Pozna, J. Lizon, Ch. Lucuix, S. Menardi, P. Haguenauer, P. Gitton, S. Morel, F. Gonté, P. Jolley, G. Rupprecht, P. Bourget, F. Delplancke, L. Mehrgan, J. Stegmeier, G. van Belle, A. Richichi, A. Moorwood

Proceedings Volume 8445, 84450R (2012) https://doi.org/10.1117/12.926238

KEYWORDS: Interferometry, Sensors, Visibility, Mid-IR, L band, Telescopes, Spectral resolution, Image restoration, Interferometers, Photometry

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Proceedings Article | 12 September 2012 Paper

Paper

VLTI/AMBER differential interferometry of the broad-line region of the quasar 3C273

Romain Petrov, Florentin Millour, Stéphane Lagarde, Martin Vannier, Suvendu Rakshit, Alessandro Marconi, Gerd weigelt

Proceedings Volume 8445, 84450W (2012) https://doi.org/10.1117/12.926595

KEYWORDS: Visibility, Calibration, Interferometry, Data processing, Error analysis, Colorimetry, Fourier transforms, Spectral resolution, K band, Sensors

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Proceedings Article | 16 September 2011 Paper

Paper

Status report on the Large Binocular Telescope's ARGOS ground-layer AO system

M. Hart, S. Rabien, L. Busoni, L. Barl, U. Beckmann, M. Bonaglia, Y. Boose, J. Borelli, T. Bluemchen, L. Carbonaro, C. Connot, M. Deysenroth, R. Davies, O. Durney, M. Elberich, T. Ertl, S. Esposito, W. Gaessler, V. Gasho, H. Gemperlein, P. Hubbard, S. Kanneganti, M. Kulas, K. Newman, J. Noenickx, G. Orban de Xivry, D. Peter, A. Quirrenbach, M. Rademacher, C. Schwab, J. Storm, V. Vaitheeswaran, G. Weigelt, J. Ziegleder

Proceedings Volume 8149, 81490J (2011) https://doi.org/10.1117/12.893916

KEYWORDS: Telescopes, Adaptive optics, Mirrors, Sensors, Stars, Control systems, Cameras, Wavefronts, Beam splitters, Wavefront sensors

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Proceedings Article | 28 July 2010 Open Access

Open Access

Paper

ARGOS: the laser guide star system for the LBT

S. Rabien, N. Ageorges, L. Barl, U. Beckmann, T. Blümchen, M. Bonaglia, J. Borelli, J. Brynnel, L. Busoni, L. Carbonaro, R. Davies, M. Deysenroth, O. Durney, M. Elberich, S. Esposito, V. Gasho, W. Gässler, H. Gemperlein, R. Genzel, R. Green, M. Haug, M. Hart, P. Hubbard, S. Kanneganti, E. Masciadri, J. Noenickx, G. Orban de Xivry, D. Peter, A. Quirrenbach, M. Rademacher, H. Rix, P. Salinari, C. Schwab, J. Storm, L. Strüder, M. Thiel, G. Weigelt, J. Ziegleder

Proceedings Volume 7736, 77360E (2010) https://doi.org/10.1117/12.857210

KEYWORDS: Adaptive optics, Mirrors, Stars, Laser systems engineering, Wavefront sensors, Sensors, Laser guide stars, Telescopes, Calibration, Turbulence

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Proceedings Article | 22 July 2010 Paper

Paper

Imaging beyond the fringe: an update on the LINC-NIRVANA Fizeau interferometer for the LBT

T. Herbst, R. Ragazzoni, A. Eckart, G. Weigelt

Proceedings Volume 7734, 773407 (2010) https://doi.org/10.1117/12.856492

KEYWORDS: Telescopes, Mirrors, Adaptive optics, Interferometry, Wavefront sensors, Interferometers, Visible radiation, Optical benches, Control systems, Fizeau interferometers

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Proceedings Article | 22 July 2010 Paper

Paper

OVMS: the optical path difference and vibration monitoring system for the LBT and its interferometers

M. Kürster, T. Bertram, J. L. Borelli, M. Brix, W. Gässler, T. Herbst, V. Naranjo, J.-U. Pott, J. Trowitzsch, T. Connors, P. Hinz, T. McMahon, D. Ashby, J. Brynnel, N. Cushing, T. Edgin, J. Esguerra, R. Green, J. Kraus, J. Little, U. Beckmann, G. Weigelt

Proceedings Volume 7734, 77342Y (2010) https://doi.org/10.1117/12.856693

KEYWORDS: Telescopes, Adaptive optics, Interferometers, Mirrors, Control systems, Data archive systems, Observatories, Data acquisition, Interferometry, Distributed computing

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Proceedings Article | 22 July 2010 Paper

Paper

First results from VLTI near-infrared interferometry on high-mass young stellar objects

Stefan Kraus, Karl-Heinz Hofmann, Karl Menten, Dieter Schertl, Gerd Weigelt, Friedrich Wyrowski, Anthony Meilland, Karine Perraut, Romain Petrov, Sylvie Robbe-Dubois, Peter Schilke, Leonardo Testi

Proceedings Volume 7734, 773408 (2010) https://doi.org/10.1117/12.858285

KEYWORDS: Stars, Interferometry, Data modeling, Visibility, Infrared radiation, Telescopes, Infrared technology, Synthetic apertures, Spatial resolution, K band

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Proceedings Article | 28 July 2008 Paper

Paper

Phase referencing in optical interferometry

Mercedes Filho, Paulo Garcia, Gilles Duvert, Gaspard Duchene, Eric Thiebaut, John Young, Olivier Absil, Jean-Phillipe Berger, Thomas Beckert, Sebastian Hoenig, Dieter Schertl, Gerd Weigelt, Leonardo Testi, Eric Tatuli, Virginie Borkowski, Michaël de Becker, Jean Surdej, Bernard Aringer, Joseph Hron, Thomas Lebzelter, Andrea Chiavassa, Romano Corradi, Tim Harries

Proceedings Volume 7013, 70131F (2008) https://doi.org/10.1117/12.787908

KEYWORDS: Visibility, Image restoration, Optical interferometry, Image resolution, Stars, Telescopes, Radio optics, Interferometry, Signal to noise ratio, Fourier transforms

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Proceedings Article | 28 July 2008 Paper

Paper

VLTI-AMBER observations of Eta Carinae with the FINITO fringe tracker and spectral resolution 12000

Gerd Weigelt, Olivier Chesneau, Thomas Driebe, Renaud Foy, Didier Fraix-Burnet, Jose Groh, Karl-Heinz Hofmann, Stefan Kraus, Fabien Malbet, Alessandro Marconi, Philippe Mathias, Florentin Millour, Jean-Louis Monin, Romain Petrov, Frederik Rantakyrö, Andrea Richichi, Dieter Schertl, Markus Schöller, Philippe Stee, Leonardo Testi, Markus Wittkowski

Proceedings Volume 7013, 701303 (2008) https://doi.org/10.1117/12.796204

KEYWORDS: Visibility, Bromine, Spectral resolution, Phase measurement, Spectroscopy, Interferometry, Stars, Speckle, Telescopes, Binary data

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Proceedings Article | 28 July 2008 Paper

Paper

LINC-NIRVANA: the Fizeau interferometer for the Large Binocular Telescope

T. Herbst, R. Ragazzoni, A. Eckart, G. Weigelt

Proceedings Volume 7013, 701326 (2008) https://doi.org/10.1117/12.788378

KEYWORDS: Telescopes, Interferometry, Modulation transfer functions, Mirrors, Spatial resolution, Interferometers, Point spread functions, Fizeau interferometers, Adaptive optics, Spatial frequencies

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Proceedings Article | 28 July 2008 Paper

Paper

Science case for 1 mas spectro-imagining in the near-infrared

Paulo Garcia, Jean-Philippe Berger, Alessandro Marconi, Alexander Krivov, Andrea Chiavassa, Bernard Aringer, Brunella Nisini, Denis Defrére, Dimitri Mawet, Dieter Schertl, Eric Tatuli, Eric Thiébaut, Fabien Baron, Fabien Malbet, Gaspard Duchéne, Gerd Weigelt, Gilles Duvert, Gilles Henri, Hubert Klahr, Jean Surdej, Jean-Charles Augereau, Jean-François Claeskens, John Young, Josef Hron, Karine Perraut, Karl-Heinz Hofmann, Leonardo Testi, Margarida Cunha, Mercedes Filho, Michaël De Becker, Olivier Absil, Olivier Chesneau, Pierre Collette, Pierre-Olivier Petrucci, Ralph Neuhaeuser, Romano Corradi, Sónia Antón, Sebastian Wolf, Sebastian Hoenig, Stephanie Renard, Thierry Forveille, Thomas Beckert, Thomas Lebzelter, Tim Harries, Virginie Borkowski, Xavier Bonfils

Proceedings Volume 7013, 70134N (2008) https://doi.org/10.1117/12.789216

KEYWORDS: Stars, Telescopes, Spatial resolution, Planets, Galactic astronomy, Adaptive optics, Spectral resolution, Visibility, Interferometry, High dynamic range imaging

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We present the work developed within the science team of the Very Large Telescope Interferometer Spectro-Imager (VSI) during the Phase A studies. VSI aims at delivering ~ 1 milliarcsecond resolution data cubes in the near-infrared, with several spectral resolutions up to 12 000, by combining up to 8 VLTI telescopes. In the design of an instrument, the science case plays a central role by supporting the instrument construction decision, defining the top-level requirements and balancing design options. The overall science philosophy of VSI was that of a general user instrument serving a broad community. The science team addressed themes which included several areas of astrophysics and illustrated specific modes of operation of the instrument: a) YSO disks and winds; b) Multiplicity of young stars; c) Exoplanets; d) Debris disks; e) Stellar surface imaging; f) The environments of evolved stars; g) AGN tori; h) AGN's Broad Line Region; i) Supermassive black-holes; and j) Microlensing. The main conclusions can be summarized as follows: a) The accessible targets and related science are extremely sensitive to the instrument limiting magnitude; the instrument should be optimized for sensitivity and have its own fringe tracker. b) Most of the science cases are readily achievable with on-axis fringe tracking, off-axis fringe tracking enabling extra science. c) In most targets (YSOs, evolved stars and AGNs), the interpretation and analysis of circumstellar/nuclear dust morphology requires direct access to the gas via spectral resolved studies of emission lines, requiring at least a spectral resolution of 2 500. d) To routinely deliver images at the required sensitivity, the number of telescopes in determinant, with 6 telescopes being favored. e) The factorial increase in the number of closure phases and visibilities, gained in a single observation, makes massive surveys of parameters and related science for the first time possible. f) High dynamic range imaging and very high dynamic range differential closure phase are possible allowing the study of debris disks and characterization of pegasides. g) Spectro-imaging in the near-infrared is highly complementary to ALMA, adaptive optics and interferometric imaging in the thermal infrared.

Proceedings Article | 28 July 2008 Paper

Paper

VSI: the VLTI spectro-imager

F. Malbet, D. Buscher, G. Weigelt, P. Garcia, M. Gai, D. Lorenzetti, J. Surdej, J. Hron, R. Neuhäuser, P. Kern, L. Jocou, J.-P. Berger, O. Absil, U. Beckmann, L. Corcione, G. Duvert, M. Filho, P. Labeye, E. Le Coarer, G. Li Causi, J. Lima, K. Perraut, E. Tatulli, E. Thiébaut, J. Young, G. Zins, A. Amorim, B. Aringer, T. Beckert, M. Benisty, X. Bonfils, A. Cabral, A. Chelli, O. Chesneau, A. Chiavassa, R. Corradi, M. De Becker, A. Delboulbé, G. Duchêne, T. Forveille, C. Haniff, E. Herwats, K.-H. Hofmann, J.-B. Le Bouquin, S. Ligori, D. Loreggia, A. Marconi, A. Moitinho, B. Nisini, P.-O. Petrucci, J. Rebordao, R. Speziali, L. Testi, F. Vitali

Proceedings Volume 7013, 701329 (2008) https://doi.org/10.1117/12.789710

KEYWORDS: Telescopes, Stars, Spectral resolution, Spatial resolution, Interferometry, Integrated optics, Space telescopes, Visibility, Image restoration, Signal to noise ratio

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The VLTI Spectro Imager (VSI) was proposed as a second-generation instrument of the Very Large Telescope Interferometer providing the ESO community with spectrally-resolved, near-infrared images at angular resolutions down to 1.1 milliarcsecond and spectral resolutions up to R = 12000. Targets as faint as K = 13 will be imaged without requiring a brighter nearby reference object; fainter targets can be accessed if a suitable reference is available. The unique combination of high-dynamic-range imaging at high angular resolution and high spectral resolution enables a scientific program which serves a broad user community and at the same time provides the opportunity for breakthroughs in many areas of astrophysics. The high level specifications of the instrument are derived from a detailed science case based on the capability to obtain, for the first time, milliarcsecond-resolution images of a wide range of targets including: probing the initial conditions for planet formation in the AU-scale environments of young stars; imaging convective cells and other phenomena on the surfaces of stars; mapping the chemical and physical environments of evolved stars, stellar remnants, and stellar winds; and disentangling the central regions of active galactic nuclei and supermassive black holes. VSI will provide these new capabilities using technologies which have been extensively tested in the past and VSI requires little in terms of new infrastructure on the VLTI. At the same time, VSI will be able to make maximum use of new infrastructure as it becomes available; for example, by combining 4, 6 and eventually 8 telescopes, enabling rapid imaging through the measurement of up to 28 visibilities in every wavelength channel within a few minutes. The current studies are focused on a 4-telescope version with an upgrade to a 6-telescope one. The instrument contains its own fringe tracker and tip-tilt control in order to reduce the constraints on the VLTI infrastructure and maximize the scientific return.

Proceedings Article | 28 July 2008 Paper

Paper

Phase closure image reconstruction for future VLTI instrumentation

Mercedes Filho, Stephanie Renard, Paulo Garcia, Gilles Duvert, Eric Thiebaut, John Young, Olivier Absil, Jean-Phillipe Berger, Thomas Beckert, Sebastian Hoenig, Dieter Schertl, Gerd Weigelt, Leonardo Testi, Eric Tatuli, Virginie Borkowski, Michaël de Becker, Jean Surdej, Bernard Aringer, Joseph Hron, Thomas Lebzelter, Andrea Chiavassa, Romano Corradi, Tim Harries

Proceedings Volume 7013, 70133Z (2008) https://doi.org/10.1117/12.787877

KEYWORDS: Telescopes, Visibility, Image restoration, Interferometry, Astatine, Data modeling, Stars, Interferometers, Fourier transforms, Optical interferometry

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Proceedings Article | 28 July 2008 Paper

Paper

System overview of the VLTI Spectro-Imager

L. Jocou, J. P. Berger, F. Malbet, P. Kern, U. Beckmann, D. Lorenzetti, L. Corcione, G. Li Causi, D. Buscher, J. Young, M. Gai, G. Weigelt, G. Zins, G. Duvert, K. Perraut, P. Labeye, O. Absil, P. Garcia, D. Loreggia, J. Lima, J. Rebordao, S. Ligori, A. Amorim, P. Rabou, J. B. Le Bouquin, C. Haniff, E. Le Coarer, P. Feautrier, G. Duchene, M. Benisty, A. Chelli, E. Herwats, A. Delboulbé

Proceedings Volume 7013, 70132Y (2008) https://doi.org/10.1117/12.789154

KEYWORDS: Optical fibers, Mirrors, Sensors, Beam splitters, Interferometry, Spectrographs, Fourier transforms, Calibration, Information operations, Computed tomography

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Proceedings Article | 28 July 2008 Paper

Paper

Wolf-Rayet stars probed by AMBER/VLTI

Florentin Millour, Olivier Chesneau, Thomas Driebe, Romain Petrov, Daniel Bonneau, Luc Dessart, Karl-Heinz Hofmann, Gerd Weigelt

Proceedings Volume 7013, 70130T (2008) https://doi.org/10.1117/12.788719

KEYWORDS: Stars, Visibility, K band, Interferometry, Spectral resolution, Binary data, Telescopes, Data acquisition, Spectroscopy, Bromine

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Proceedings Article | 28 July 2008 Paper

Paper

Aperture-synthesis imaging with the mid-infrared instrument MATISSE

Karl-Heinz Hofmann, Matthias Heininger, Walter Jaffe, Stefan Kraus, Bruno Lopez, Florentin Millour, Dieter Schertl, Gerd Weigelt, Sebastian Wolf

Proceedings Volume 7013, 70133Y (2008) https://doi.org/10.1117/12.788904

KEYWORDS: Signal to noise ratio, Visibility, Interferometry, Image restoration, Astatine, Photons, Reconstruction algorithms, Mid-IR, Calibration, Image resolution

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Proceedings Article | 28 July 2008 Paper

Paper

Mid-infrared view of cool evolved stars with the Very Large Telescope Interferometer

Keiichi Ohnaka, Thomas Driebe, Karl-Heinz Hofmann, Gerd Weigelt, Markus Wittkowski

Proceedings Volume 7013, 70134M (2008) https://doi.org/10.1117/12.788775

KEYWORDS: Stars, Silicates, Carbon, Mid-IR, Visibility, Large telescopes, Interferometers, Solids, Interferometry, Diamond

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Proceedings Article | 28 July 2008 Paper

Paper

2008 imaging beauty contest

William Cotton, John Monnier, Fabien Baron, Karl-Heinz Hofmann, Stefan Kraus, Gerd Weigelt, Sridharan Rengaswamy, Eric Thiébaut, Peter Lawson, Walter Jaffe, Christian Hummel, Tom Pauls, Henrique Schmitt, Peter Tuthill, John Young

Proceedings Volume 7013, 70131N (2008) https://doi.org/10.1117/12.788903

KEYWORDS: Data modeling, K band, Interferometry, Image restoration, Reconstruction algorithms, Visibility, Stars, Phase measurement, Image quality, Astronomical imaging

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Proceedings Article | 28 July 2008 Paper

Paper

Infrared spectro-interferometry of YSOs

Stefan Kraus, Karl-Heinz Hofmann, Keiichi Ohnaka, Thomas Preibisch, Gerd Weigelt

Proceedings Volume 7013, 70130R (2008) https://doi.org/10.1117/12.789219

KEYWORDS: Stars, Visibility, Interferometry, Infrared radiation, Calibration, Near infrared, Infrared spectroscopy, Beryllium, Bromine, Binary data

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Proceedings Article | 28 July 2008 Paper

Paper

MATISSE: perspective of imaging in the mid-infrared at the VLTI

B. Lopez, P. Antonelli, S. Wolf, S. Lagarde, W. Jaffe, R. Navarro, U. Graser, R. Petrov, G. Weigelt, Y. Bresson, K. Hofmann, U. Beckman, T. Henning, W. Laun, Ch. Leinert, S. Kraus, S. Robbe-Dubois, F. Vakili, A. Richichi, P. Abraham, J.-C. Augereau, J. Behrend, Ph. Berio, N. Berruyer, O. Chesneau, J. Clausse, C. Connot, K. Demyk, W. Danchi, M. Dugué, G. Finger, S. Flament, A. Glazenborg, H. Hannenburg, M. Heininger, Y. Hugues, J. Hron, S. Jankov, F. Kerschbaum, G. Kroes, H. Linz, J.-L. Lizon, Ph. Mathias, R. Mathar, A. Matter, J. Menut, K. Meisenheimer, F. Millour, N. Nardetto, U. Neumann, E. Nussbaum, A. Niedzielski, L. Mosoni, J. Olofsson, Y. Rabbia, T. Ratzka, F. Rigal, A. Roussel, D. Schertl, F.-X. Schmider, B. Stecklum, E. Thiebaut, M. Vannier, B. Valat, K. Wagner, L. B. F. M. Waters

Proceedings Volume 7013, 70132B (2008) https://doi.org/10.1117/12.789412

KEYWORDS: Mid-IR, Planets, Stars, Interferometry, Spectral resolution, Spectroscopy, Mirrors, Telescopes, Sensors, Observatories

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Proceedings Article | 9 July 2008 Paper

Paper

LINC-NIRVANA: achieving 10 mas imagery on the Large Binocular Telescope

T. Herbst, R. Ragazzoni, A. Eckart, G. Weigelt

Proceedings Volume 7014, 70141A (2008) https://doi.org/10.1117/12.788374

KEYWORDS: Mirrors, Telescopes, Adaptive optics, Interferometry, Wavefront sensors, Astronomy, Panoramic photography, Spatial resolution, Radio astronomy, Imaging systems

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Proceedings Article | 7 July 2008 Open Access

Open Access

Paper

The laser guide star program for the LBT

S. Rabien, N. Ageorges, R. Angel, G. Brusa, J. Brynnel, L. Busoni, R. Davies, M. Deysenroth, S. Esposito, W. Gässler, R. Genzel, R. Green, M. Haug, M. Lloyd Hart, G. Hölzl, E. Masciadri, R. Pogge, A. Quirrenbach, M. Rademacher, H. W. Rix, P. Salinari, C. Schwab, T. Stalcup, J. Storm, L. Strüder, M. Thiel, G. Weigelt, J. Ziegleder

Proceedings Volume 7015, 701515 (2008) https://doi.org/10.1117/12.788173

KEYWORDS: Adaptive optics, Telescopes, Stars, Laser guide stars, Wavefront sensors, Laser systems engineering, Sensors, Space telescopes, Mirrors, Diffraction

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Proceedings Article | 29 June 2006 Paper

Paper

VEGA: a visible spectrograph and polarimeter for CHARA science cases description

Philippe Stee, Denis Mourard, Daniel Bonneau, Paul Berlioz-Arthaud, Armando Domiciano de Souza, Renaud Foy, Petr Harmanec, Slobodan Jankov, Pierre Kervella, Pavel Koubsky, Stéphane Lagarde, Jean-Baptiste Le Bouquin, Philippe Mathias, Antoine Mérand, Nicolas Nardetto, Romain Petrov, Karine Rousselet-Perraut, Chantal Stehlé, Gerd Weigelt

Proceedings Volume 6268, 62683R (2006) https://doi.org/10.1117/12.684479

KEYWORDS: Stars, Visible radiation, Spectral resolution, Spatial resolution, Interferometry, Interferometers, Visibility, Signal to noise ratio, Magnetism, Spectroscopy

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Proceedings Article | 28 June 2006 Paper

Paper

Aperture-synthesis imaging with the LBT: reconstruction of diffraction-limited images from LBT LINC-NIRVANA data using the Richardson-Lucy and regularized building block method

Karl-Heinz Hofmann, Thomas Driebe, Mathias Heininger, Dieter Schertl, Gerd Weigelt

Proceedings Volume 6268, 62683H (2006) https://doi.org/10.1117/12.671535

KEYWORDS: Point spread functions, Computer simulations, Image restoration, Stars, Telescopes, Galactic astronomy, Device simulation, Space telescopes, Sensors, Error analysis

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Proceedings Article | 28 June 2006 Paper

Paper

Aperture synthesis image reconstruction study for the mid-infrared VLTI imager MATISSE

Karl-Heinz Hofmann, Stefan Kraus, Bruno Lopez, Gerd Weigelt, Sebastian Wolf

Proceedings Volume 6268, 62683I (2006) https://doi.org/10.1117/12.671678

KEYWORDS: Visibility, Astatine, Image restoration, Mid-IR, Synthetic apertures, Image quality, Telescopes, Interferometry, Imaging systems, Image resolution

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Proceedings Article | 28 June 2006 Paper

Paper

2006 interferometry imaging beauty contest

Peter Lawson, William Cotton, Christian Hummel, Fabien Baron, John Young, Stefan Kraus, Karl-Heinz Hofmann, Gerd Weigelt, Michael Ireland, John Monnier, Eric Thiébaut, Sridharan Rengaswamy, Olivier Chesneau

Proceedings Volume 6268, 62681U (2006) https://doi.org/10.1117/12.670409

KEYWORDS: Interferometry, Data modeling, Interferometers, Visibility, Image restoration, Image resolution, Reconstruction algorithms, Observatories, Algorithm development, Telescopes

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Proceedings Article | 28 June 2006 Paper

Paper

VLTI-AMBER observations of Eta Carinae with high spatial resolution and spectral resolutions of 1,500 and 10,000

Gerd Weigelt, Romain Petrov, Olivier Chesneau, Kris Davidson, Armando Domiciano de Souza, Thomas Driebe, Renaud Foy, Didier Fraix-Burnet, Ted Gull, John Hillier, Karl-Heinz Hofmann, Stefan Kraus, Fabien Malbet, Alessandro Marconi, Philippe Mathias, Jean-Louis Monin, Florentin Millour, Keiichi Ohnaka, Frederik Rantakyrö, Andrea Richichi, Dieter Schertl, Markus Schöller, Philippe Stee, Leonardo Testi, Markus Wittkowski

Proceedings Volume 6268, 62682S (2006) https://doi.org/10.1117/12.671582

KEYWORDS: Visibility, Bromine, Spectral resolution, K band, Stars, Spatial resolution, Phase measurement, Observatories, Interferometry, Near infrared

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Proceedings Article | 28 June 2006 Paper

Paper

VLTI/MIDI observation of the silicate carbon star Hen 38 (IRAS08002-3803): silicate dust reservoir spatially resolved for the first time

Keiichi Ohnaka, Thomas Driebe, Karl-Heinz Hofmann, Thomas Preibisch, Dieter Schertl, Gerd Weigelt

Proceedings Volume 6268, 62682V (2006) https://doi.org/10.1117/12.671145

KEYWORDS: Silicates, Stars, Carbon, Visibility, Surface conduction electron emitter displays, Iron, Radiative transfer, Spherical lenses, Lawrencium, Solids

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Proceedings Article | 28 June 2006 Paper

Paper

MATISSE: a four beam combiner in the mid-infrared for the VLTI

S. Lagarde, B. Lopez, P. Antonelli, U. Beckman, J. Behrend, Y. Bresson, O. Chesneau, M. Dugué, A. Glazenborg, U. Graser, K. Hofmann, W. Jaffe, Ch. Leinert, F. Millour, J. Menut, R. Petrov, T. Ratzka, G. Weigelt, S. Wolf, P. Abraham, C. Connot, T. Henning, M. Heininger, Y. Hugues, S. Kraus, W. Laun, A. Matter, U. Neumann, E. Nussbaum, A. Niedzielski, L. Mosoni, S. Robbe-Dubois, A. Roussel, D. Schertl, F. Vakili, K. Wagner, L.B.F.M. Waters

Proceedings Volume 6268, 62683M (2006) https://doi.org/10.1117/12.671690

KEYWORDS: Sensors, Signal to noise ratio, Telescopes, Mid-IR, Spectral resolution, Interferometers, Spectroscopes, Phase measurement, Interferometry, Mirrors

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Proceedings Article | 27 June 2006 Paper

Paper

MATISSE: perspective of imaging in the mid-infrared at the VLTI

B. Lopez, S. Wolf, S. Lagarde, P. Abraham, P. Antonelli, J. Augereau, U. Beckman, J. Behrend, N. Berruyer, Y. Bresson, O. Chesneau, J. Clausse, C. Connot, K. Demyk, W. Danchi, M. Dugué, S. Flament, A. Glazenborg, U. Graser, T. Henning, K. Hofmann, M. Heininger, Y. Hugues, W. Jaffe, S. Jankov, S. Kraus, W. Laun, Ch. Leinert, H. Linz, Ph. Mathias, K. Meisenheimer, A. Matter, J. Menut, F. Millour, U. Neumann, E. Nussbaum, A. Niedzielski, L. Mosonic, R. Petrov, T. Ratzka, S. Robbe-Dubois, A. Roussel, D. Schertl, F.-X. Schmider, B. Stecklum, E. Thiebaut, F. Vakili, K. Wagner, L. B. F. M. Waters, G. Weigelt

Proceedings Volume 6268, 62680Z (2006) https://doi.org/10.1117/12.671636

KEYWORDS: Mid-IR, Planets, Stars, Spectral resolution, Interferometry, Spectroscopy, Signal to noise ratio, Visibility, Spatial resolution, Sensors

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Proceedings Article | 27 June 2006 Paper

Paper

The imaging fringe and flexure tracker of LINC-NIRVANA: basic opto-mechanical design and principle of operation

Christian Straubmeier, Thomas Bertram, Andreas Eckart, Steffen Rost, Yeping Wang, Tom Herbst, Roberto Ragazzoni, Gerd Weigelt

Proceedings Volume 6268, 62681I (2006) https://doi.org/10.1117/12.670160

KEYWORDS: Telescopes, Interferometry, Adaptive optics, Sensors, Wavefronts, Point spread functions, Cameras, Mirrors, Optical tracking, Interferometers

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Proceedings Article | 27 June 2006 Paper

Paper

VSI: a milli-arcsec spectro-imager for the VLTI

F. Malbet, P. Kern, J.-P. Berger, L. Jocou, P. Garcia, D. Buscher, K. Rousselet-Perraut, G. Weigelt, M. Gai, J. Surdej, J. Hron, R. Neuhäuser, E. Le Coarer, P. Labeye, J. Le Bouquin, M. Benisty, E. Herwats

Proceedings Volume 6268, 62680Y (2006) https://doi.org/10.1117/12.673098

KEYWORDS: Telescopes, Stars, Information operations, Integrated optics, Spectral resolution, Spectrographs, Imaging spectroscopy, Sensors, Adaptive optics, Phase measurement

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Proceedings Article | 22 June 2006 Paper

Paper

First astrophysical results from AMBER/VLTI

F. Malbet, R. Petrov, G. Weigelt, P. Stee, E. Tatulli, A. Domiciano de Souza, F. Millour

Proceedings Volume 6268, 626802 (2006) https://doi.org/10.1117/12.673100

KEYWORDS: Stars, Visibility, Bromine, Interferometry, Beryllium, K band, Telescopes, Kinematics, Instrument modeling, Large telescopes

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Proceedings Article | 25 October 2004 Paper

Paper

LINC-NIRVANA: the single arm MCAO experiment

Sebastian Egner, Wolfgang Gaessler, Tom Herbst, Roberto Ragazzoni, Remko Stuik, D. Andersen, C. Arcidiacono, H. Baumeister, U. Beckmann, J. Behrend, T. Bertram, P. Bizenberger, H. Boehnhardt, E. Diolaiti, T. Driebe, A. Eckhardt, J. Farinato, M. Kuerster, W. Laun, S. Ligori, Vianak Naranjo, E. Nußbaum, H.-W. Rix, R.-R. Rohloff, Piero Salinari, R. Soci, C. Straubmeier, E. Vernet-Viard, Gerd Weigelt, R. Weiss, W. Xu

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550046

KEYWORDS: Actuators, Telescopes, Mirrors, Adaptive optics, Deformable mirrors, Temperature metrology, Stars, Cameras, Interferometers, Wavefront sensors

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Proceedings Article | 25 October 2004 Paper

Paper

LINC-NIRVANA: how to get a 23-m wavefront nearly flat

Wolfgang Gaessler, Roberto Ragazzoni, Thomas Herbst, David Andersen, Carmelo Arcidiacono, Harald Baumeister, Udo Beckmann, Jan Behrend, Thomas Bertram, Peter Bizenberger, Hermann Bohnhardt, F. Briegel, Emiliano Diolaiti, Thomas Driebe, A. Eckhardt, Sebastian Egner, Jacopo Farinato, Matthias Heininger, M. Kürster, Werner Laun, Sebastiano Ligori, Vianak Naranjo, Edmund Nussbaum, Hans-Walter Rix, Ralf-Rainer Rohloff, Piero Salinari, Roberto Soci, Clemens Storz, Christian Straubmeier, Elise Vernet-Viard, Gerd Weigelt, Robert Weiss, Wenli Xu

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.551908

KEYWORDS: Stars, Telescopes, Sensors, Wavefront sensors, Adaptive optics, Mirrors, Actuators, Wavefronts, Interferometry, Turbulence

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Proceedings Article | 20 October 2004 Paper

Paper

Recombining light of the VLTI at 10 microns by densifying the images

Michel Dugue, Bruno Lopez, Frank Przygodda, Uwe Graser, Philippe Gitton, Sebastian Wolf, Philippe Mathias, Pierre Antonelli, J. C. Augereau, Nicole Berruyer, Yves Bresson, Olivier Chesneau, Anne Dutrey, Sebastien Flament, Annelie Glazenborg-Kluttig, Andreas Glindemann, Thomas Henning, Karl-Heinz Hofmann, Stephane Lagarde, Yves Hugues, Christoph Leinert, Klaus Meisenheimer, Jean-Luc Menut, Ralf-Rainer Rohloff, Alain Roussel, Eric Thiebaut, Gerd Weigelt

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551543

KEYWORDS: Telescopes, Synthetic apertures, Mid-IR, Interferometry, Astatine, Segmented mirrors, Observatories, Optical instrument design, Stars, Mirrors

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Proceedings Article | 20 October 2004 Paper

Paper

APreS-MIDI, APerture Synthesis in the MID-infrared with the VLTI

Bruno Lopez, Frank Przygodda, Sebastian Wolf, Michel Dugue, Uwe Graser, Philippe Gitton, Philippe Mathias, Pierre Antonelli, J. C. Augereau, Nicole Berruyer, Yves Bresson, Olivier Chesneau, Anne Dutrey, Sebastien Flament, Annelie Glazenborg, Andreas Glindemann, Thomas Henning, Karl-Heinz Hofmann, Yves Hugues, Stephane Lagarde, Christoph Leinert, Klaus Meisenheimer, Jean-Luc Menut, Ralf-Rainer Rohloff, Alain Roussel, Eric Thiebaut, Gerd Weigelt

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551419

KEYWORDS: Mid-IR, Stars, Telescopes, Visibility, Synthetic apertures, Interferometry, Interferometers, Astatine, Galactic astronomy, Space telescopes

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Proceedings Article | 20 October 2004 Paper

Paper

The fringe and flexure tracking system for LINC-NIRVANA: basic design and principle of operation

Christian Straubmeier, Thomas Bertram, Andreas Eckart, Yibing Wang, Lahbib Zealouk, Thomas Herbst, David Andersen, Roberto Ragazzoni, Gerd Weigelt

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551113

KEYWORDS: Interferometry, Telescopes, Sensors, Adaptive optics, Point spread functions, Wavefronts, Control systems, Detector arrays, Spatial resolution, Detection and tracking algorithms

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Proceedings Article | 20 October 2004 Paper

Paper

Interferometric observations of the Mira star o Ceti with the VLTI/VINCI instrument in the near-infrared

Henry Woodruff, Maren Eberhardt, Thomas Driebe, Karl-Heinz Hofmann, Keiichi Ohnaka, Andrea Richichi, Dieter Schertl, Markus Schoeller, Michael Scholz, Gerd Weigelt, Markus Wittkowski, Peter Wood

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551245

KEYWORDS: Visibility, Stars, Calibration, Interferometry, Atmospheric modeling, K band, Data modeling, Spatial frequencies, Surface conduction electron emitter displays, Speckle

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Proceedings Article | 20 October 2004 Paper

Paper

High-resolution near-infrared speckle interferometry and radiative transfer modeling of the OH/IR star OH 104.9+2.4

Dominik Riechers, Yuri Balega, Thomas Driebe, Karl-Heinz Hofmann, Alexander Men'shchikov, Dieter Schertl, Gerd Weigelt

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551413

KEYWORDS: Visibility, Surface conduction electron emitter displays, Stars, Cadmium sulfide, Radiative transfer, Silicates, Data modeling, Speckle interferometry, K band, Scattering

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Proceedings Article | 20 October 2004 Paper

Paper

Science program of the AMBER consortium

Fabien Malbet, Thomas Driebe, Renaud Foy, Didier Fraix-Burnet, Philippe Mathias, Alessandro Marconi, Jean-Louis Monin, Romain Petrov, Philippe Stee, Leonardo Testi, Gerd Weigelt

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.550667

KEYWORDS: Stars, Telescopes, Beryllium, Interferometry, Spectral resolution, K band, Phase measurement, Interferometers, Spatial resolution, Astatine

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

The VLTI focal instrument Amber: results of the first phase of the alignment, integration, and verification in Paranal

Sylvie Robbe-Dubois, Romain Petrov, Stephane Lagarde, Pierre Antonelli, Yves Bresson, Alain Roussel, Denis Mourard, Fabien Malbet, Florentin Millour, Gerard Zins, Alain Delboulbe, Gilles Duvert, Laurence Gluck, Pierre Kern, Etienne LeCoarer, Karine Rousselet-Perraut, Eric Tatulli, Udo Beckmann, Matthias Heininger, Gerd Weigelt, Franco Lisi, Paolo Stefanini, Matteo Accardo, Carla Gil, Martin Vannier, Nicholas Haddad, Nico Housen, Mario Kiekebusch, Pedro Mardones, Florence Puech, Fredrik Rantakyro, Andrea Richichi, Markus Schoeller

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.550323

KEYWORDS: Stellar interferometry, Astronomy, Optical instrument design, Telescopes, Stars, Visibility

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Proceedings Article | 20 October 2004 Paper

Paper

The fringe and flexure tracking detector of the LBT LINC-NIRVANA beam-combiner instrument

Udo Beckmann, Jan Behrend, Hermann Bohnhardt, Claus Connot, Thomas Driebe, Matthias Heininger, Thomas Herbst, Karl-Heinz Hofmann, Edmund Nussbaum, Dieter Schertl, Walter Solscheid, Christian Straubmeier, Gerd Weigelt

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551195

KEYWORDS: Sensors, Electronics, Signal processing, Clocks, Stars, Atmospheric optics, Signal detection, Video, Image processing, Analog electronics

Read Abstract +

Proceedings Article | 30 September 2004 Paper

Paper

The LINC-NIRVANA interferometric imager for the Large Binocular Telescope

Tom Herbst, Roberto Ragazzoni, Andreas Eckart, Gerd Weigelt

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.551516

KEYWORDS: Telescopes, Sensors, Interferometry, Mirrors, Point spread functions, Cryogenics, Interferometers, Adaptive optics, Turbulence, Imaging systems

Read Abstract +

Proceedings Article | 15 September 2004 Paper

Paper

UML modeling of the LINC-NIRVANA control software

Wolfgang Gaessler, Thomas Bertram, F. Briegel, Thomas Driebe, Matthias Heininger, Edmund Nussbaum, Clemens Storz, J. Wang, Lahbib Zealouk, Thomas Herbst, Roberto Ragazzoni, A. Eckhardt, Gerd Weigelt

Proceedings Volume 5496, (2004) https://doi.org/10.1117/12.551756

KEYWORDS: Adaptive optics, Telescopes, Stars, Control systems, Mirrors, Infrared cameras, Interfaces, Space telescopes, Diffraction, Interferometry

Read Abstract +

Proceedings Article | 7 July 2004 Paper

Paper

LINC-NIRVANA: first attempt of an instrument for a 23-m-class telescope

Wolfgang Gassler, Thomas Herbst, Roberto Ragazzoni, David Andersen, Carmelo Arcidiacono, Harald Baumeister, Udo Beckmann, Thomas Bertram, Peter Bizenberger, Hermann Bohnhardt, Emiliano Diolaiti, Andreas Eckart, Jacopo Farinato, Sebastiano Ligori, Hans-Walter Rix, Ralf-Rainer Rohloff, Piero Salinari, Roberto Soci, Christian Straubmeier, Elise Vernet-Viard, Gerd Weigelt, Robert Weiss, Wenli Xu

Proceedings Volume 5382, (2004) https://doi.org/10.1117/12.566389

KEYWORDS: Telescopes, Sensors, Adaptive optics, Wavefront sensors, Stars, Collimators, Mirrors, Cameras, Optical instrument design, Deformable mirrors

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

Interferometric studies of nearby galactic centers

Markus Wittkowski, Wolfgang Duschl, Karl-Heinz Hofmann, Alexander Men'shchikov, Gerd Weigelt

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.457964

KEYWORDS: Interferometry, Visibility, Interferometers, K band, Spatial resolution, Clouds, Telescopes, Stars, Radio optics, Diffraction

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Proceedings Article | 21 February 2003 Paper

Paper

New beam-combination techniques at IOTA

Wesley Traub, Angela Ahearn, Nathaniel Carleton, Jean-Philippe Berger, Michael Brewer, Karl-Heinz Hofmann, Pierre Kern, Marc Lacasse, Fabien Malbet, Rafael Millan-Gabet, John Monnier, Keiichi Ohnaka, Ettore Pedretti, Sam Ragland, F. Peter Schloerb, Kamal Souccar, Gerd Weigelt

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459718

KEYWORDS: Telescopes, Stars, Sensors, Interferometers, Integrated optics, Mirrors, Charge-coupled devices, Visibility, Computing systems, Control systems

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Proceedings Article | 21 February 2003 Paper

Paper

Astrophysical potential of the AMBER/VLTI instrument

Fabien Malbet, Thomas Bloecker, Renaud Foy, Didier Fraix-Burnet, Philippe Mathias, Alesssandro Marconi, Jean-Louis Monin, Romain Petrov, Philippe Stee, Leonardo Testi, Gerd Weigelt

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458907

KEYWORDS: Stars, Spectral resolution, Visibility, Interferometers, Telescopes, Phase measurement, Planets, Jupiter, Large telescopes, Spatial frequencies

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Proceedings Article | 21 February 2003 Paper

Paper

Bispectrum speckle interferometry and future long-baseline interferometry of the young bipolar outflow source S140 IRS1

Thomas Preibisch, Yuri Balega, Dieter Schertl, Karl-Heinz Hofmann, Gerd Weigelt

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458897

KEYWORDS: Infrared imaging, Speckle, Polarization, Interferometry, Speckle interferometry, Image resolution, K band, Stars, Infrared radiation, Telescopes

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Proceedings Article | 21 February 2003 Paper

Paper

Bispectrum speckle interferometry and future long-baseline interferometry of the carbon star IRC+ 10216

Thomas Bloecker, Yuri Balega, Karl-Heinz Hofmann, Alexander Men'shchikov, Gerd Weigelt, Jan-Martin Winters

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458916

KEYWORDS: Stars, Speckle, K band, Interferometry, Carbon, Telescopes, Radiative transfer, Image resolution, Speckle interferometry, Modeling

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Proceedings Article | 21 February 2003 Paper

Paper

Using the near-infrared VLTI instrument AMBER

Romain Petrov, Fabien Malbet, Gerd Weigelt, Franco Lisi, Pascal Puget, Pierre Antonelli, Udo Beckmann, Stephane Lagarde, Etienne Lecoarer, Sylvie Robbe-Dubois, Gilles Duvert, Sandro Gennari, Alain Chelli, Michel Dugue, Karine Rousselet-Perraut, Martin Vannier, Denis Mourard

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459113

KEYWORDS: Calibration, Visibility, Stars, Telescopes, Spectrographs, Sensors, Phase measurement, Spatial filters, Planets, Astatine

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Proceedings Article | 21 February 2003 Paper

Paper

Near-infrared IOTA interferometry of the symbiotic star CH Cyg

Karl-Heinz Hofmann, Udo Beckmann, Jean-Philippe Berger, Thomas Bloecker, Michael Brewer, Marc Lacasse, Victor Malanushenko, Rafael Millan-Gabet, John Monnier, Keiichi Ohnaka, Ettore Pedretti, Dieter Schertl, F. Peter Schloerb, Michael Scholz, Wesley Traub, Gerd Weigelt, Boris Yudin

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458904

KEYWORDS: Visibility, Stars, K band, Interferometry, Electromagnetic coupling, Linear filtering, Astronomy, Interferometers, Radium, Physics

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

JHK-band spectro-interferometry of T Cep with the IOTA interferometer

Gerd Weigelt, Udo Beckmann, Jean-Philippe Berger, Thomas Bloecker, Michael Brewer, Karl-Heinz Hofmann, Marc Lacasse, Victor Malanushenko, Rafael Millan-Gabet, John Monnier, Keiichi Ohnaka, Ettore Pedretti, Dieter Schertl, F. Peter Schloerb, Michael Scholz, Wesley Traub, Boris Yudin

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458659

KEYWORDS: Visibility, K band, Stars, Interferometers, Radium, Linear filtering, Astronomy, Prisms, Temperature metrology, Spatial frequencies

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Proceedings Article | 21 February 2003 Paper

Paper

IOTA observation of the circumstellar envelope of R CrB

Keiichi Ohnaka, Udo Beckmann, Jean-Philippe Berger, Michael Brewer, Karl-Heinz Hofmann, Marc Lacasse, Victor Malanushenko, Rafael Millan-Gabet, John Monnier, Ettore Pedretti, Dieter Schertl, F. Peter Schloerb, Victor Shenavrin, Wesley Traub, Gerd Weigelt, Boris Yudin

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458931

KEYWORDS: Visibility, Stars, K band, Interferometry, Surface conduction electron emitter displays, Clouds, Infrared telescopes, Astronomy, Infrared radiation, Optical telescopes

Read Abstract +

SPIE Journal Paper | 1 May 2001

Computer simulations of interferometric imaging with the Very Large Telescope Interferometer and its Astronomical Multibeam Recombiner instrument

Frank Przygodda, Thomas Bloecker, Karl-Heinz Hofmann, Gerd Weigelt

OE, Vol. 40, Issue 05, (May 2001) https://doi.org/10.1117/12.10.1117/1.1361106

KEYWORDS: Visibility, Computer simulations, Stars, Interferometry, Telescopes, Error analysis, Device simulation, Sensors, Interferometers, Astronomy

Proceedings Article | 5 July 2000 Paper

Paper

Observations of MIRA stars with the IOTA/FLUOR interferometer and comparison with MIRA star models

Karl-Heinz Hofmann, Udo Beckmann, Thomas Bloecker, Vincent Coude du Foresto, Marc Lacasse, Rafael Millan-Gabet, Sebastien Morel, B. Pras, Cyril Ruilier, Dieter Schertl, Michael Scholz, Victor Shenavrin, Wesley Traub, Gerd Weigelt, Markus Wittkowski, Boris Yudin

Proceedings Volume 4006, (2000) https://doi.org/10.1117/12.390270

KEYWORDS: Stars, K band, Visibility, Temperature metrology, Interferometers, Spatial frequencies, Fiber optics, Atmospheric optics, Astronomy, Interferometry

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Proceedings Article | 5 July 2000 Paper

Paper

AMBER: the near-infrared focal instrument for the Very Large Telescope Interferometer

Romain Petrov, Fabien Malbet, Andrea Richichi, Karl-Heinz Hofmann, Denis Mourard, Karim Agabi, Pierre Antonelli, Eric Aristidi, Carlo Baffa, Udo Beckmann, Philippe Berio, Yves Bresson, Frederic Cassaing, Alain Chelli, Albrecht Dreiss, Michel Dugue, Gilles Duvert, Thierry Forveille, E. Fossat, Sandro Gennari, M. Geng, Andre Glentzlin, Daniel Kamm, Stephane Lagarde, Etienne LeCoarer, Danielle LeContel, John Michel LeContel, Franco Lisi, Bruno Lopez, Gilbert Mars, Gregoire Martinot-Lagarde, Djamel Mekarnia, Jean-Louis Monin, David Mouillet, Christian Perrier-Bellet, Pascal Puget, Yves Rabbia, Sylvestre Rebattu, Francois Reynaud, Sylvie Robbe-Dubois, Karine Perraut-Rousselet, Michel Sacchettini, Markus Schoeller, Isabelle Tallon-Bosc, Gerd Weigelt

Proceedings Volume 4006, (2000) https://doi.org/10.1117/12.390256

KEYWORDS: Telescopes, Visibility, Interferometry, Spectrographs, Adaptive optics, Sensors, Stars, Spatial filters, Interferometers, Optical fibers

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Proceedings Article | 5 July 2000 Paper

Paper

GI2T/REGAIN spectro-interferometry with a new infrared beam combiner

Gerd Weigelt, Denis Mourard, Lyu Abe, Udo Beckmann, Olivier Chesneau, C. Hillemanns, Karl-Heinz Hofmann, Sam Ragland, Dieter Schertl, Michael Scholz, Philippe Stee, Nathalie Thureau, Farrokh Vakili

Proceedings Volume 4006, (2000) https://doi.org/10.1117/12.390261

KEYWORDS: Stars, Calcium, Visibility, K band, Infrared radiation, Interferometers, Temperature metrology, Digital signal processing, Carbon monoxide, Signal processing

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Proceedings Article | 5 July 2000 Paper

Paper

Science opportunities with AMBER, the near-IR VLTI instrument

Andrea Richichi, Thomas Bloecker, Renaud Foy, Didier Fraix-Burnet, Bruno Lopez, Fabien Malbet, Philippe Stee, Oskar von der Luehe, Gerd Weigelt

Proceedings Volume 4006, (2000) https://doi.org/10.1117/12.390266

KEYWORDS: Stars, Spatial resolution, Visibility, Interferometry, Interferometers, Telescopes, Exoplanets, Spectral resolution, Astatine, Data modeling

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Proceedings Article | 5 July 2000 Paper

Paper

Computer simulations of interferometric imaging with the VLT Interferometer and the AMBER instrument

Thomas Bloecker, Karl-Heinz Hofmann, Frank Przygodda, Gerd Weigelt

Proceedings Volume 4006, (2000) https://doi.org/10.1117/12.390205

KEYWORDS: Visibility, Interferometry, Computer simulations, Stars, Interferometers, Radiative transfer, Sensors, Atmospheric propagation, Device simulation, Telescopes

Read Abstract +

Proceedings Article | 24 July 1998 Paper

Paper

Interferometry with the Large Binocular Telescope

James Roger Angel, John Hill, Peter Strittmatter, Piero Salinari, Gerd Weigelt

Proceedings Volume 3350, (1998) https://doi.org/10.1117/12.317156

KEYWORDS: Telescopes, Stars, Interferometry, Space telescopes, Image resolution, Mirrors, Adaptive optics, Interferometers, Planets, Galactic astronomy

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Proceedings Article | 10 September 1993 Paper

Paper

SISTERS: a space interferometer for the search for terrestrial exo-planets by rotation shearing

Pierre Bely, Christopher Burrows, Francois Roddier, Gerd Weigelt, Marco Bernasconi

Proceedings Volume 1947, (1993) https://doi.org/10.1117/12.155753

KEYWORDS: Stars, Planets, Interferometers, Mirrors, Chemical elements, Optical components, Interferometry, Shearing interferometers, Space operations, Control systems

Read Abstract +

Proceedings Article | 10 September 1993 Paper

Paper

HARDI-2: a high-angular-resolution deployable interferometer for UV observations of nearby stars

Pierre Bely, Christopher Burrows, H. Lamers, Francois Roddier, Gerd Weigelt

Proceedings Volume 1947, (1993) https://doi.org/10.1117/12.155754

KEYWORDS: Stars, Interferometers, Ultraviolet radiation, Space operations, Imaging spectroscopy, Mirrors, Space telescopes, Astronomy, Active optics, Wavefront sensors

Read Abstract +

Proceedings Article | 1 November 1990 Paper

Paper

Image reconstruction from the bispectrum using an iterative algorithm and applications of the method to astronomical objects

Karl-Heinz Hofmann, Gerd Weigelt

Proceedings Volume 1351, (1990) https://doi.org/10.1117/12.23661

KEYWORDS: Image restoration, Reconstruction algorithms, Astronomy, Speckle, Telescopes, Photography, Point spread functions, Stars, Earth's atmosphere, Interferometry

Read Abstract +

Proceedings Article | 1 July 1990 Paper

Paper

Objective prism speckle spectroscopy and wideband projection speckle spectroscopy

F. Griegor, Gerd Weigelt

Proceedings Volume 1319, (1990) https://doi.org/10.1117/12.34795

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Proceedings Article | 1 July 1990 Paper

Paper

Photon-counting speckle masting

Karl-Heinz Hofmann, W. Mauder, Gerd Weigelt

Proceedings Volume 1319, (1990) https://doi.org/10.1117/12.34796

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Proceedings Article | 1 July 1990 Open Access

Open Access

Paper

VLT interferometer: proposed implementation

Jacques Beckers, Daniel Enard, Michel Faucherre, Fritz Merkle, G. Di Benedetto, R. Braun, R. Foy, Reinhard Genzel, Laurent Koechlin, Gerd Weigelt

Proceedings Volume 1236, (1990) https://doi.org/10.1117/12.19191

KEYWORDS: Telescopes, Interferometry, Interferometers, Mirrors, Adaptive optics, Optical telescopes, Fermium, Frequency modulation, Infrared telescopes, Relays

Read Abstract +

Proceedings Article | 1 July 1990 Paper

Paper

Optical long-baseline interferometry in astronomy

Thorsten Reinheimer, Gerd Weigelt

Proceedings Volume 1319, (1990) https://doi.org/10.1117/12.34925

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Proceedings Article | 1 July 1990 Paper

Paper

Image reconstruction from the bispectrum using an iterative algorithm and applications of the method to astronomical objects

Karl-Heinz Hofmann, Gerd Weigelt

Proceedings Volume 1319, (1990) https://doi.org/10.1117/12.34797

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Showing 5 of 95 publications

Proceedings Volume Editor (1)

SPIE Conference Volume | 1 July 1990

Optics in Complex Systems

Conference Committee Involvement (2)

Advances in Stellar Interferometry

25 May 2006 | Orlando, Florida , United States

New Frontiers in Stellar Interferometry

21 June 2004 | Glasgow, United Kingdom

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