Space Telescope Imaging Spectrograph detectors and ultraviolet signal-to-noise capabilities

Mary Elizabeth Kaiser; Bruce E. Woodgate; Randy A. Kimble; Charles W. Bowers; Steven B. Kraemer; Vic S. Argabright; Phillip A. Driggers; Don J. Lindler; Ralph C. Bohlin; Charles N. Van Houten; Richard L. Bybee; Alan W. Delamere; David A. Dorn; Anthony C. Danks; Charles L. Joseph; J. Gethyn Timothy; Theodore R. Gull; Terrence L. Beck; Morley M. Blouke; Lawrence W. Brown; Mark D. Brumfield; Mark Clampin; David A. Content; Lee D. Feinberg; Walter B. Fowler; Paul Goudfrooij; Robert J. Hill; Richard Reed; Clive Standley; J. J. Yagelowich

doi:10.1117/12.324542

28 August 1998 Space Telescope Imaging Spectrograph detectors and ultraviolet signal-to-noise capabilities

Mary Elizabeth Kaiser, Bruce E. Woodgate, Randy A. Kimble, Charles W. Bowers, Steven B. Kraemer, Vic S. Argabright, Phillip A. Driggers, Don J. Lindler, Ralph C. Bohlin, Charles N. Van Houten, Richard L. Bybee, Alan W. Delamere, David A. Dorn, Anthony C. Danks, Charles L. Joseph, J. Gethyn Timothy, Theodore R. Gull, Terrence L. Beck, Morley M. Blouke, Lawrence W. Brown, Mark D. Brumfield, Mark Clampin, David A. Content, Lee D. Feinberg, Walter B. Fowler, Paul Goudfrooij, Robert J. Hill, Richard Reed, Clive Standley, J. J. Yagelowich

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Proceedings Volume 3356, Space Telescopes and Instruments V; (1998) https://doi.org/10.1117/12.324542
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

The space telescope imaging spectrograph (STIS) was designed as a versatile spectrograph capable of maintaining or exceeding the spectroscopic capabilities of both the Goddard High Resolution Spectrograph and the Faint Object Spectrograph (FOS) over the broad bandpass extending from the UV through the visible. STIS achieves performance gains over the aforementioned first generation Hubble Space Telescope instruments primarily through the use of large a real detectors in both the UV and visible regions of the spectrum. Simultaneous spatial and spectral coverage is provided through long slit or slitless spectroscopy. This paper will review the detector design and in-flight performance. Attention will be focussed on the key issue of S/N performance. Spectra obtained during the first few months of operation, illustrate that high signal-to-noise spectra can be obtained while exploiting STIS's multiplexing advantage. From analysis of a single spectrum of GD153, with counting statistics of approximately 165, a S/N of approximately 130 is achieved per spectral resolution element in the FUV. In the NUV a single spectrum of GRW + 70D5824, with counting statistics of approximately 200, yields a S/N of approximately 150 per spectral resolution element. An even higher S/N capability is illustrated through the use of the fixed pattern split slits in the medium resolution echelle modes where observations of BD28D42 yield a signal-to-noise of approximately 250 and approximately 350 per spectral resolution element in the FUV and NUV respectively.

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Mary Elizabeth Kaiser, Bruce E. Woodgate, Randy A. Kimble, Charles W. Bowers, Steven B. Kraemer, Vic S. Argabright, Phillip A. Driggers, Don J. Lindler, Ralph C. Bohlin, Charles N. Van Houten, Richard L. Bybee, Alan W. Delamere, David A. Dorn, Anthony C. Danks, Charles L. Joseph, J. Gethyn Timothy, Theodore R. Gull, Terrence L. Beck, Morley M. Blouke, Lawrence W. Brown, Mark D. Brumfield, Mark Clampin, David A. Content, Lee D. Feinberg, Walter B. Fowler, Paul Goudfrooij, Robert J. Hill, Richard Reed, Clive Standley, and J. J. Yagelowich "Space Telescope Imaging Spectrograph detectors and ultraviolet signal-to-noise capabilities", Proc. SPIE 3356, Space Telescopes and Instruments V, (28 August 1998); https://doi.org/10.1117/12.324542

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KEYWORDS

Sensors

Charge-coupled devices

Signal to noise ratio

Ultraviolet radiation

Spectral resolution

Spectrographs

Quantum efficiency

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