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Proceedings Paper

Calibrating SNAP
Author(s): Susana Deustua; Sahar Allam; Ralph C. Bohlin; Steven M. Kent; Michael L. Lampton; Bryan E. Laubscher; Nick Mostek; Stuart Mufson; Michael Richmond; J. Allyn Smith; Douglas Tucker
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Paper Abstract

The SNAP (Supernova/Acceleration Probe) mission's primary science goal is the determination of the properties of the dark energy. Specifically, observations of distant Type Ia supernovae will be used to measure the dark energy equation of state constant parameter, w0, and time varying parameter, w1, to a fractional uncertainty of 0.05 and 0.3 respectively. This places stringent requirements on the control of systematics and on the absolute color calibration of these supernovae. The overall calibration for the SNAP CCD and NIR imagers and spectrograph will be conducted through several routes. We envision employing a variety of well-studied stars, certainly including the HST spectrophotometric standard stars (and possibly the Sun) and performing indirect transfer calibrations that permit comparison with NIST irradiance standards to close the loop with fundamental MKS quantities. We discuss the basic issues and possible strategies in order to achieve approximately 2 - 3% color errors over the wavelength range of from 350 to 1700 nm.

Paper Details

Date Published: 8 December 2003
PDF: 9 pages
Proc. SPIE 5164, UV/EUV and Visible Space Instrumentation for Astronomy II, (8 December 2003); doi: 10.1117/12.506652
Show Author Affiliations
Susana Deustua, American Astronomical Society (United States)
Sahar Allam, Fermi National Accelerator Lab. (United States)
Ralph C. Bohlin, Space Telescope Science Institute (United States)
Steven M. Kent, Fermi National Accelerator Lab. (United States)
Michael L. Lampton, Univ. of California/Berkeley (United States)
Bryan E. Laubscher, Los Alamos National Lab. (United States)
Nick Mostek, Indiana Univ. (United States)
Stuart Mufson, Indiana Univ. (United States)
Michael Richmond, Rochester Institute of Technology (United States)
J. Allyn Smith, Los Alamos National Lab. (United States)
Douglas Tucker, Fermi National Accelerator Lab. (United States)

Published in SPIE Proceedings Vol. 5164:
UV/EUV and Visible Space Instrumentation for Astronomy II
Oswald H. W. Siegmund, Editor(s)

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