Dr. Pavan Bilgi Profile

Dr. Pavan Bilgi

at Carnegie Observatories

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Author

Publications (7)

SPIE Journal Paper | 6 September 2023

Automatic spectrograph control software for SDSS-V Local Volume Mapper

Changgon Kim, José Sánchez-Gallego, Pavan Bilgi, Mingyeong Yang, Florian Briegel, Tae-Geun Ji, Nicholas P. Konidaris, Taeeun Kim, Hojae Ahn, Mingyu Jeon, Hyun Chul Park, Hye-In Lee, Cynthia S. Froning, Solange Ramirez, Niv Drory, Juna A. Kollmeier, Soojong Pak

JATIS, Vol. 9, Issue 03, 037002, (September 2023) https://doi.org/10.1117/12.10.1117/1.JATIS.9.3.037002

KEYWORDS: Spectrographs, Control software, Software development, Charge-coupled devices, Camera shutters, Design and modelling, Control systems, Computer architecture, Data acquisition, Switches

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Proceedings Article | 7 October 2022 Paper

The SDSS-V local volume mapper fibre cable assembly and metrology

Tobias Feger, Ellen Houston, Yevgen Kripak, Ross Zhelem, Timothy Chin, David Adams, Scott Case, David Robertson, Jon Lawrence, Tom Herbst, Pavan Bilgi, Nicholas Konidaris, Leon Aslan, Guillermo Blanc, Stefanie Wachter, Solange Ramírez, Niv Drory, Juna Kollmeier, Cynthia Froning

Proceedings Volume 12184, 121846Q (2022) https://doi.org/10.1117/12.2629083

KEYWORDS: Spectrographs, Metrology, Tolerancing, Telescopes, Inspection, Surface finishing, Polishing, Interfaces, Observatories, Assembly tolerances

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Proceedings Article | 29 August 2022 Poster + Presentation + Paper

Development of the spectrograph control software package for SDSS-Ⅴ Local Volume Mapper Instrument

Changgon Kim, José Sanchez-Gallego, Pavan Bilgi, Mingyeong Yang, Florian Briegel, Tae-Geun Ji, Nicholas P. Konidaris, Taeeun Kim, Hojae Ahn, Mingyu Jeon, Hyun Chul Park, Hye-In Lee, Cynthia S. Froning, Solange Ramirez, Niv Drory, Juna A. Kollmeier, Soojong Pak

Proceedings Volume 12189, 121890Z (2022) https://doi.org/10.1117/12.2627584

KEYWORDS: Spectrographs, Software development, Charge-coupled devices, Astronomy, Control systems, Camera shutters, Transducers, Galactic astronomy, Data acquisition, Computer architecture

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Proceedings Article | 14 December 2020 Poster + Presentation

The SDSS-V local volume mapper fiber cable system

Tobias Feger, Scott Case, Ross Zhelem, Yevgen Kripak, Jon Lawrence, Christian Schwab, Tom Herbst, Guillermo Blanc, Pavan Bilgi, Nicholas Konidaris, Anthony Hebert, Stefanie Wachter, Solange Ramirez, Niv Drory, Cynthia Froning

Proceedings Volume 11447, 114478N (2020) https://doi.org/10.1117/12.2562185

KEYWORDS: Calibration, Spectroscopy, Telescopes, Spectrographs, Stars, Solar system, Lanthanum, Observatories, Optical instrument design, Staring arrays

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Proceedings Article | 13 December 2020 Presentation + Paper

SDSS-V local volume mapper instrument: overview and status

Nicholas Konidaris, Niv Drory, Cynthia Froning, Anthony Hebert, Pavan Bilgi, Guillermo Blanc, Alicia Lanz, Charles Hull, Juna Kollmeier, Solange Ramirez, Stefanie Wachter, Kathryn Kreckel, Soojong Pak, Eric Pellegrini, Andrés Almeida, Scott Case, Ross Zhelem, Tobas Feger, Jon Lawrence, Michael Lesser, Tom Herbst, José Sanchez-Gallego, Matthew Bershady, Sabyasachi Chattopadhyay, Andrew Hauser, Michael Smith, Marsha Wolf, Renbin Yan

Proceedings Volume 11447, 1144718 (2020) https://doi.org/10.1117/12.2557565

KEYWORDS: Telescopes, Spectrographs, Spectroscopes, Stars, Solar system, Lanthanum, Observatories, Clouds, Spectral resolution, Atmospheric sciences

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Proceedings Article | 13 December 2020 Presentation + Paper

The SDSS-V local volume mapper telescope system

T. Herbst, Pavaman Bilgi, Peter Bizenberger, Guillermo Blanc, Florian Briegel, Scott Case, Niv Drory, Tobias Feger, Cynthia Froning, Wolfgang Gaessler, Anthony Hebert, Nicholas Konidaris, Alicia Lanz, Lars Mohr, Soojong Pak, Solange Ramírez, Ralf-Rainer Rohloff, José Sánchez-Gallego, Stefanie Wachter

Proceedings Volume 11445, 114450J (2020) https://doi.org/10.1117/12.2561419

KEYWORDS: Telescopes, Calibration, Spectrographs, Lanthanum, Spatial resolution, Optical instrument design, Observatories, Spectral resolution, Galactic astronomy, Sun

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The Sloan Digital Sky Survey V (SDSS-V) is an all-sky spectroscopic survey of <6 million objects, designed to decode the history of the Milky Way, reveal the inner workings of stars, investigate the origin of solar systems, and track the growth of supermassive black holes across the Universe. The Local Volume Mapper (LVM) is one of three surveys that form SDSS-V. LVM will employ a coordinated system of four telescopes feeding three fiber spectrographs at Las Campanas Observatory in Chile. The goal is to map approximately 2500 square degrees of the Galactic plane over the wavelength range 360-980 nm with R~4000 spectral resolution. These observations will reveal for the first time how distinct gaseous environments within the Galaxy interact with each other and with the stellar population, producing the large-scale interstellar medium that we observe. Accurately mapping and calibrating a substantial portion of the sky at this spatial resolution requires a unique type of telescope system. Each of the four LVM telescopes has a diameter of 16 cm, making them considerably smaller and lighter than the instruments they feed. One telescope will host the science IFU containing ~1800 fibers arranged in a close-packed hexagon. Two additional Calibration telescopes will observe fields adjacent to the science IFU, in order to calibrate out terrestrial airglow and other geo-coronal emission. The fourth, Spectrophotometric telescope will make rapid observations of bright stars (typically 12 during a single IFU / Calibration exposure) to correct for telluric absorption lines and overall extinction. The fibers from all three types of telescope will be interspersed in the entrance slits of the spectrographs, allowing for simultaneous science and calibration exposures. Although considerably smaller than the next generation of giants, the LVM telescopes must also operate close to the limits of physical optics, and the geometry and scope of the LVM survey present unique challenges. For example, with this type of telescope at the Las Campanas site, the effects of optical aberrations, diffraction, seeing, and (uncorrected) atmospheric dispersion are all of comparable scale. This, coupled with the need for repeated and reliable measurements over years, leads to some unconventional design choices. This paper presents the preliminary design of the LVM telescope system and discusses the requirements and tradeoffs that led to the baseline choices.

Proceedings Article | 6 July 2018 Presentation + Paper

Conceptual design of a wide-field near UV transient survey in a 6U CubeSat

Yoichi Yatsu, Toshiki Ozawa, Kenichi Sasaki, Hideo Mamiya, Nobuyuki Kawai, Yuhei Kikuya, Masanori Matsushita, Saburo Matunaga, Shouleh Nikzad, Pavaman Bilgi, Shrinivas Kulkarni, Nozomu Tominaga, Masaomi Tanaka, Tomoki Morokuma, Norihide Takeyama, Akito Enokuchi

Proceedings Volume 10699, 106990D (2018) https://doi.org/10.1117/12.2313026

KEYWORDS: Satellites, Ultraviolet radiation, Sensors, Telescopes, Space telescopes, Stars, Satellite communications, Near ultraviolet, Astronomy, Optical design

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