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

Autor:	Lombardo, Simona, Aldering, Greg, Hoffmann, Akos, Kowalski, Marek, Kuesters, Daniel, Reif, Klaus, Rigault, Mickael
Rok vydání:	2014
Předmět:	Astrophysics - Instrumentation and Methods for Astrophysics
Zdroj:	Proc. of SPIE Vol. 9147 91474R-1, 07/2014
Druh dokumentu:	Working Paper
DOI:	10.1117/12.2055066
Popis:	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 degree. 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. Comment: 11 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1412.1109 Zobrazit plný text záznamu View this record from Arxiv