Dr. Sylvia M. Baggett Profile

Dr. Sylvia M. Baggett

Deputy Wide-Field Camera 3 Team at Space Telescope Science Institute

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Author

Publications (18)

Proceedings Article | 6 July 2018 Paper

Sink pixels in the HST wide-field channel 3 CCDs

S. Baggett, M. Bourque, J. Anderson, J. Ryon

Proceedings Volume 10709, 1070933 (2018) https://doi.org/10.1117/12.2313923

KEYWORDS: Surface plasmons, Amplifiers, Calibration, CCD cameras, Hubble Space Telescope, Cameras, Image quality, Charge-coupled devices, Sensors, Electrons

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Proceedings Article | 29 July 2016 Paper

HST/WFC3: understanding and mitigating radiation damage effects in the CCD detectors

S. Baggett, J. Anderson, M. Sosey, C. Gosmeyer, M. Bourque, V. Bajaj, H. Khandrika, C. Martlin

Proceedings Volume 9904, 99045D (2016) https://doi.org/10.1117/12.2233407

KEYWORDS: Radiation effects, Sensors, Cameras, Charge-coupled devices, Calibration, Amplifiers, Photometry, Signal attenuation, Stars, Data acquisition

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Proceedings Article | 28 August 2014 Paper

HST/WFC3: new capabilities, improved IR detector calibrations, and long-term performance stability

John MacKenty, Sylvia Baggett, Gabriel Brammer, Bryan Hilbert, Knox Long, Peter McCullough, Adam Riess

Proceedings Volume 9143, 914328 (2014) https://doi.org/10.1117/12.2056853

KEYWORDS: Sensors, Stars, Calibration, Charge-coupled devices, Infrared detectors, Infrared radiation, Electrons, CCD image sensors, Mercury cadmium telluride, Infrared imaging

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Wide Field Camera 3 (WFC3) is the most used instrument on board the Hubble Space Telescope. Providing a broad range of high quality imaging capabilities from 200 to 1700mn using Silicon CCD and HgCdTe IR detectors, WFC3 is fulfilling both our expectations and its formal requirements. With the re-establishment of the observatory level "spatial scan" capability, we have extended the scientific potential ofWFC3 in multiple directions. These controlled scans, often in combination with low resolution slit-less spectroscopy, enable extremely high precision differential photometric measurements of transiting exo-planets and direct measurement of sources considerably brighter than originally anticipated. In addition, long scans permit the measurement of the separation of star images to accuracies approaching 25 micro-arc seconds (a factor of 10 better than prior FGS or imaging measurements) enables direct parallax observations out to 4 kilo-parsecs. In addition, we have employed this spatial scan capability to both assess and improve the mid spatial frequency flat field calibrations. WFC3 uses a Teledyne HgCdTe 1014xl014 pixel Hawaii-lR infrared detector array developed for this mission. One aspect of this detector with implications for many types of science observations is the localized trapping of charge. This manifests itself as both image persistence lasting several hours and as an apparent response variation with photon arrival rate over a large dynamic range. Beyond a generally adopted observing strategy of obtaining multiple observations with small spatial offsets, we have developed a multi-parameter model that accounts for source flux, accumulated signal level, and decay time to predict image persistence at the pixel level. Using a running window through the entirety of the acquired data, we now provide observers with predictions for each individual exposure within several days of its acquisition. Ongoing characterization of the sources on infrared background and the causes of its temporal and spatial variation has led to the appreciation of the impact of He I 1.083 micron emission from the earth's atmosphere. This adds a significant and variable background to the two filters and two grisms which include this spectral feature when the HST spacecraft is outside of the earth's shadow. After nearly five years in orbit, long term trending of the scientific and engineering behavior of WFC3 demonstrates excellent stability other than the expected decline in CCD charge transfer efficiency. Addition of post-flash signal to images is shown to markedly improve the transfer efficiency for low level signals. Combined with a pixel based correction algorithm developed at STScl, CCD performance is stabilized at levels only slightly degraded from its initial values.

Proceedings Article | 25 September 2012 Paper

HST/WFC3 UVIS detectors: radiation damage effects and mitigation

S. Baggett, K. Noeske, J. Anderson, J. MacKenty, L. Petro

Proceedings Volume 8453, 845336 (2012) https://doi.org/10.1117/12.926901

KEYWORDS: Sensors, Radiation effects, Stars, Amplifiers, Signal attenuation, Photometry, Calibration, Cameras, Charge-coupled devices, Data acquisition

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Proceedings Article | 21 September 2012 Paper

Characterizing persistence in the IR detector within the Wide Field Camera 3 instrument on the Hubble Space Telescope

Knox Long, Sylvia Baggett, John MacKenty, Adam Riess

Proceedings Volume 8442, 84421W (2012) https://doi.org/10.1117/12.926778

KEYWORDS: Sensors, Infrared detectors, Infrared imaging, Data modeling, Infrared sensors, Diodes, Cameras, Hubble Space Telescope, Infrared telescopes, Calibration

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Proceedings Article | 11 August 2010 Paper

WFC3 detectors: on-orbit performance

S. Baggett, J. MacKenty, R. Kimble, T. Borders, B. Hilbert, S. Deustua, V. Kozhurina-Platais, K. Long, A. Riess, R. Gilliland, R. Hill, J. Kalirai

Proceedings Volume 7731, 773138 (2010) https://doi.org/10.1117/12.857642

KEYWORDS: Quantum efficiency, Sensors, Charge-coupled devices, Infrared detectors, Staring arrays, Calibration, Cameras, Multiplexers, Mercury cadmium telluride, Stars

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Proceedings Article | 11 August 2010 Paper

Persistence and count-rate nonlinearity in the HST WFC3 IR detector

Susana Deustua, Knox Long, Peter McCullough, Adam Riess, John MacKenty, Randy Kimble, Sylvia Baggett, Bryan Hilbert, Robert Hill, Cheryl Pavlovsky, Larry Petro

Proceedings Volume 7731, 77313C (2010) https://doi.org/10.1117/12.857582

KEYWORDS: Stars, Sensors, Infrared detectors, Mercury cadmium telluride, Cameras, Infrared sensors, Infrared imaging, Photometry, Tungsten, Space telescopes

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Proceedings Article | 17 September 2009 Paper

Wide Field Camera 3 CCD quantum efficiency hysteresis: characterization and mitigation

Nicholas Collins, Nicholas Boehm, Gregory Delo, Roger Foltz, Robert Hill, Emily Kan, Randy Kimble, Eliot Malumuth, Robert Rosenberry, Augustyn Waczynski, Yiting Wen, Sylvia Baggett, Howard Bushouse, Susana Deustua, Jessica Kim-Quijano, John MacKenty, Andre Martel, Elena Sabbi

Proceedings Volume 7439, 74390B (2009) https://doi.org/10.1117/12.828439

KEYWORDS: Sensors, Signal detection, Charge-coupled devices, CCD cameras, Quantum efficiency, Cameras, Near ultraviolet, Lamps, Visible radiation, Calibration

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Proceedings Article | 22 July 2008 Paper

The Wide-Field Camera 3 detectors

S. Baggett, R. Hill, R. Kimble, J. MacKenty, A. Waczynski, H. Bushouse, N. Boehm, H. Bond, T. Brown, N. Collins, G. Delo, L. Dressel, R. Foltz, G. Hartig, B. Hilbert, E. Kan, J. Kim-Quijano, E. Malumuth, A. Martel, P. McCullough, L. Petro, M. Robberto, Y. Wen

Proceedings Volume 7021, 70211Q (2008) https://doi.org/10.1117/12.790056

KEYWORDS: Sensors, Quantum efficiency, Charge-coupled devices, Cameras, Staring arrays, Infrared imaging, Infrared detectors, Amplifiers, Thermography, Optical filters

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Proceedings Article | 12 July 2008 Paper

Wide field camera 3 ground testing and calibration

H. Bushouse, S. Baggett, H. Bond, T. Brown, S. Deustua, G. Hartig, B. Hilbert, R. Hill, J. Kim-Quijano, R. Kimble, J. MacKenty, A. Martel, P. McCullough, L. Petro, S. Rinehart, M. Robberto

Proceedings Volume 7010, 70104P (2008) https://doi.org/10.1117/12.789569

KEYWORDS: Staring arrays, Sensors, Calibration, Infrared imaging, Charge-coupled devices, Cameras, Thermography, Infrared sensors, Optical filters, Imaging systems

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Proceedings Article | 15 June 2006 Paper

Filters for HST Wide Field Camera 3

S. Baggett, T. Brown, R. Boucarut, D. Figer, G. Hartig, R. Kimble, J. MacKenty, M. Robberto, R. Telfer, J. Kim-Quijano, M. Quijada, G. Allen, P. Arsenovic, B. Hilbert, O. Lupie, J. Townsend

Proceedings Volume 6265, 626532 (2006) https://doi.org/10.1117/12.672300

KEYWORDS: Optical filters, Image filtering, Bandpass filters, Ultraviolet radiation, Optical filtering, Coating, Cameras, Infrared imaging, Sensors, Visible radiation

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Proceedings Article | 15 June 2006 Paper

Spectral and imaging performance of WFC3 interference filters

M. Quijada, R. Boucarut, R. Telfer, S. Baggett, J. Kim Quijano, George Allen, Peter Arsenovic

Proceedings Volume 6265, 626531 (2006) https://doi.org/10.1117/12.672352

KEYWORDS: Optical filters, Image filtering, Wavefronts, Optical filtering, Transmittance, Cameras, Sensors, Ultraviolet radiation, Phase retrieval, Absorbance

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Proceedings Article | 10 June 2006 Paper

Wide-field camera 3 ground testing and calibration

H. Bushouse, S. Baggett, T. Brown, G. Hartig, B. Hilbert, R. Hill, R. Kimble, O. Lupie, J. MacKenty, I. Reid, M. Robberto

Proceedings Volume 6265, 62650J (2006) https://doi.org/10.1117/12.672007

KEYWORDS: Sensors, Infrared imaging, Staring arrays, Thermography, Charge-coupled devices, Optical filters, Cameras, Infrared sensors, Calibration, Infrared detectors

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Proceedings Article | 29 September 2004 Paper

The infrared detectors for the wide field camera 3 on HST

Massimo Robberto, Sylvia Baggett, B. Hilbert, John MacKenty, Randy Kimble, Robert Hill, David Cottingham, Greg Delo, Scott Johnson, Wayne Landsman, Eliot Malumuth, Elizabeth Polidan, Anne Russell, Augustyn Waczynski, Edward Wassell, Yiting Wen, Allan Haas, John Montroy, Eric Piquette, Kadri Vural, Craig Cabelli, Donald Hall

Proceedings Volume 5499, (2004) https://doi.org/10.1117/12.551807

KEYWORDS: Quantum efficiency, Sensors, Infrared detectors, Cameras, Space telescopes, Mercury cadmium telluride, Electrons, Astronomy, Capacitance, Hubble Space Telescope

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Proceedings Article | 12 January 2004 Paper

Selection of the infrared detectors for Wide Field Camera 3 on the Hubble Space Telescope

Massimo Robberto, Massimo Stiavelli, Sylvia Baggett, Bryan Hilbert, John MacKenty, Randy Kimble, Robert Hill, David Cottingham, Gregory Delo, Scott Johnson, Wayne Landsman, Eliot Malumuth, Elizabeth Polidan, Anne Russell, Augustyn Waczynski, Edward Wassell, Yiting Wen, Allan Haas, John Montroy, Eric Piquette, Kadri Vural, Craig Cabelli, Donald Hall

Proceedings Volume 5167, (2004) https://doi.org/10.1117/12.507334

KEYWORDS: Sensors, Quantum efficiency, Cameras, Infrared detectors, Hubble Space Telescope, Space telescopes, Infrared sensors, Multiplexers, Optical filters, Mercury cadmium telluride

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Proceedings Article | 5 March 2003 Paper

Infrared detectors for WFC3 on the Hubble Space Telescope

Massimo Robberto, Sylvia Baggett, Chris Hanley, B. Hilbert, John MacKenty, Edward Cheng, Robert Hill, Scott Johnson, Eliot Malumuth, Elizabeth Polidan, Augustyn Waczynski, Yiting Wen, Allan Haas, John Montroy, Eric Piquette, Kadri Vural, Craig Cabelli, Donald Hall

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461197

KEYWORDS: Sensors, Hubble Space Telescope, Infrared detectors, Mercury cadmium telluride, Multiplexers, Detector development, Cameras, Quantum efficiency, Diodes, Polarization

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Proceedings Article | 2 June 1995 Paper

Effects of the space environment on the HST Wide Field Planetary Camera-I

John MacKenty, Sylvia Baggett, John Biretta, Michael Hinds, Christine Ritchie, Lee Feinberg, John Trauger

Proceedings Volume 2478, (1995) https://doi.org/10.1117/12.210921

KEYWORDS: Contamination, Sensors, Charge-coupled devices, CCD image sensors, Ultraviolet radiation, Cameras, Radiation effects, UV optics, Optical filters, Environmental sensing

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Proceedings Article | 1 November 1993 Paper

On-orbit management of contaminants within the Hubble Space Telescope widefield planetary camera and their effect on instrument performance

John MacKenty, Glenn Schneider, Sylvia Baggett, Dana Mitchell, Christine Ritchie, William Sparks

Proceedings Volume 1945, (1993) https://doi.org/10.1117/12.158770

KEYWORDS: Ultraviolet radiation, Floods, Sensors, Charge-coupled devices, CCD image sensors, Cameras, Quantum efficiency, Head, Hubble Space Telescope, CCD cameras

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Showing 5 of 18 publications

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