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Proceedings Paper

A flux calibration device for the SuperNova Integral Field Spectrograph (SNIFS)
Author(s): Simona Lombardo; Greg Aldering; Akos Hoffmann; Marek Kowalski; Daniel Kuesters; Klaus Reif; Michael Rigault
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Paper Abstract

Observational cosmology employing optical surveys often require precise flux calibration. In this context we present SNIFS Calibration Apparatus (SCALA), a flux calibration system developed for the SuperNova Integral Field Spectrograph (SNIFS), operating at the University of Hawaii 2.2 m telescope. SCALA consists of a hexagonal array of 18 small parabolic mirrors distributed over the face of, and feeding parallel light to, the telescope entrance pupil. The mirrors are illuminated by integrating spheres and a wavelength-tunable (from UV to IR) light source, generating light beams with opening angles of 1°. These nearly parallel beams are flat and flux-calibrated at a subpercent level, enabling us to calibrate our “telescope + SNIFS system” at the required precision.

Paper Details

Date Published: 24 July 2014
PDF: 11 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91474R (24 July 2014); doi: 10.1117/12.2055066
Show Author Affiliations
Simona Lombardo, Univ. Bonn (Germany)
Greg Aldering, Lawrence Berkeley National Lab. (United States)
Akos Hoffmann, Univ. Bonn (Germany)
Marek Kowalski, Univ. Bonn (Germany)
Daniel Kuesters, Univ. Bonn (Germany)
Klaus Reif, Univ. Bonn (Germany)
Michael Rigault, Univ. Bonn (Germany)

Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)

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