A flux calibration device for the SuperNova Integral Field Spectrograph (SNIFS)

Simona Lombardo; Greg Aldering; Akos Hoffmann; Marek Kowalski; Daniel Kuesters; Klaus Reif; Michael Rigault

doi:10.1117/12.2055066

24 July 2014 A flux calibration device for the SuperNova Integral Field Spectrograph (SNIFS)

Simona Lombardo, Greg Aldering, Akos Hoffmann, Marek Kowalski, Daniel Kuesters, Klaus Reif, Michael Rigault

Proceedings Volume 9147, Ground-based and Airborne Instrumentation for Astronomy V; 91474R (2014) https://doi.org/10.1117/12.2055066
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

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.

Citation Download Citation

Simona Lombardo, Greg Aldering, Akos Hoffmann, Marek Kowalski, Daniel Kuesters, Klaus Reif, and Michael Rigault "A flux calibration device for the SuperNova Integral Field Spectrograph (SNIFS)", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91474R (24 July 2014); https://doi.org/10.1117/12.2055066

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