Share Email Print
cover

Proceedings Paper

SNDICE: a direct illumination calibration experiment at CFHT
Author(s): C. Juramy; E. Barrelet; K. Schahmaneche; P. Bailly; W. Bertoli; C. Evrard; P. Ghislain; A. Guimard; J.-F. Huppert; D. Imbault; D. Laporte; H. Lebbolo; P. Repain; R. Sefri; A. Vallereau; D. Vincent; P. Antilogus; P. Astier; J. Guy; R. Pain; N. Regnault; R. Attapatu; T. Benedict; G. Barrick; J.-C. Cuillandre; S. Gajadhar; K. Ho; D. Salmon
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We present the first results of the SuperNova Direct Illumination Calibration Experiment (SNDICE), installed in January 2008 at the Canada France Hawaii Telescope. SNDICE is designed for the absolute calibration of the instrumental response of a telescope in general, and for the control of systematic errors in the SuperNova Legacy Survey (SNLS) on Megacam in particular. Since photometric calibration will a critical ingredient for the cosmological results of future experiments involving instruments with large focal planes (like SNAP, LSST and DUNE), SNDICE functions also as a real-size demonstrator for such a system of instrumental calibration. SNDICE includes a calibrated source of 24 LEDs, chosen for their stability, spectral coverage, and their power, sufficient for a flux of at least 100 electron/s/pixel on the camera. It includes also Cooled Large Area Photodiode modules (CLAPs), which give a redundant measurement of the flux near the camera focal plane. Before installing SNDICE on CFHT, we completed a full calibration of both subsystems, including a spectral relative calibration and a 3D mapping of the beam emitted by each LED. At CFHT, SNDICE can be operated both to obtain a complete one-shot absolute calibration of telescope transmission in all wavelengths for all filters with several incident angles, and to monitor variations on different time scales.

Paper Details

Date Published: 11 July 2008
PDF: 12 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 701451 (11 July 2008); doi: 10.1117/12.789051
Show Author Affiliations
C. Juramy, Lab. de Physique Nucléaire et de Hautes Energies (France)
E. Barrelet, Lab. de Physique Nucléaire et de Hautes Energies (France)
K. Schahmaneche, Lab. de Physique Nucléaire et de Hautes Energies (France)
P. Bailly, Lab. de Physique Nucléaire et de Hautes Energies (France)
W. Bertoli, Lab. de Physique Nucléaire et de Hautes Energies (France)
C. Evrard, Lab. de Physique Nucléaire et de Hautes Energies (France)
P. Ghislain, Lab. de Physique Nucléaire et de Hautes Energies (France)
A. Guimard, Lab. de Physique Nucléaire et de Hautes Energies (France)
J.-F. Huppert, Lab. de Physique Nucléaire et de Hautes Energies (France)
D. Imbault, Lab. de Physique Nucléaire et de Hautes Energies (France)
D. Laporte, Lab. de Physique Nucléaire et de Hautes Energies (France)
H. Lebbolo, Lab. de Physique Nucléaire et de Hautes Energies (France)
P. Repain, Lab. de Physique Nucléaire et de Hautes Energies (France)
R. Sefri, Lab. de Physique Nucléaire et de Hautes Energies (France)
A. Vallereau, Lab. de Physique Nucléaire et de Hautes Energies (France)
D. Vincent, Lab. de Physique Nucléaire et de Hautes Energies (France)
P. Antilogus, Lab. de Physique Nucléaire et de Hautes Energies (France)
P. Astier, Lab. de Physique Nucléaire et de Hautes Energies (France)
J. Guy, Lab. de Physique Nucléaire et de Hautes Energies (France)
R. Pain, Lab. de Physique Nucléaire et de Hautes Energies (France)
N. Regnault, Lab. de Physique Nucléaire et de Hautes Energies (France)
R. Attapatu, Canada-France-Hawaii Telescope Corp. (United States)
T. Benedict, Canada-France-Hawaii Telescope Corp. (United States)
G. Barrick, Canada-France-Hawaii Telescope Corp. (United States)
J.-C. Cuillandre, Canada-France-Hawaii Telescope Corp. (United States)
S. Gajadhar, Canada-France-Hawaii Telescope Corp. (United States)
K. Ho, Canada-France-Hawaii Telescope Corp. (United States)
D. Salmon, Canada-France-Hawaii Telescope Corp. (United States)


Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

© SPIE. Terms of Use
Back to Top