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Proceedings Paper

An optical to IR sky brightness model for the LSST
Author(s): Peter Yoachim; Michael Coughlin; George Z. Angeli; Charles F. Claver; Andrew J. Connolly; Kem Cook; Scott Daniel; Željko Ivezić; R. Lynne Jones; Catherine Petry; Michael Reuter; Christopher Stubbs; Bo Xin
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Paper Abstract

To optimize the observing strategy of a large survey such as the LSST, one needs an accurate model of the night sky emission spectrum across a range of atmospheric conditions and from the near-UV to the near-IR. We have used the ESO SkyCalc Sky Model Calculator1, 2 to construct a library of template spectra for the Chilean night sky. The ESO model includes emission from the upper and lower atmosphere, scattered starlight, scattered moonlight, and zodiacal light. We have then extended the ESO templates with an empirical fit to the twilight sky emission as measured by a Canon all-sky camera installed at the LSST site. With the ESO templates and our twilight model we can quickly interpolate to any arbitrary sky position and date and return the full sky spectrum or surface brightness magnitudes in the LSST filter system. Comparing our model to all-sky observations, we find typical residual RMS values of ±0.2-0.3 magnitudes per square arcsecond.

Paper Details

Date Published: 15 July 2016
PDF: 15 pages
Proc. SPIE 9910, Observatory Operations: Strategies, Processes, and Systems VI, 99101A (15 July 2016); doi: 10.1117/12.2232947
Show Author Affiliations
Peter Yoachim, Univ. of Washington (United States)
Michael Coughlin, Harvard Univ. (United States)
George Z. Angeli, LSST Project Office (United States)
Charles F. Claver, LSST Project Office (United States)
Andrew J. Connolly, Univ. of Washington (United States)
Kem Cook, Cook Astronomical Consulting (United States)
Scott Daniel, Univ. of Washington (United States)
Željko Ivezić, Univ. of Washington (United States)
R. Lynne Jones, Univ. of Washington (United States)
Catherine Petry, LSST Project Office (United States)
Michael Reuter, LSST Project Office (United States)
Christopher Stubbs, Harvard Univ. (United States)
Bo Xin, LSST Project Office (United States)

Published in SPIE Proceedings Vol. 9910:
Observatory Operations: Strategies, Processes, and Systems VI
Alison B. Peck; Robert L. Seaman; Chris R. Benn, Editor(s)

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