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Proceedings Paper

High precision metrology for large bandpass filters
Author(s): B. Sassolas; M. Betoule; N. Regnault; B. Lagrange; D. Hofman; L. Balzarini; L. Pinard; D. Forest; G. Cagnoli; J.-C. Cuillandre; T. Benedict
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Paper Abstract

High precision measurements of the filters bandpass used on wide-field imagers mounted on large telescopes is critical for type Ia supernovae studies. A dedicated spectrophotometric bench is used to re-measure the now decommissioned ugriz filters used for the SNLS on CFHT-MegaCam. A full characterization of the optical response with respect to the location on the surface and the angle of incidence was performed for each filter. Strong variation over the filter surface is observed. The impact of the actual response on the observation is evaluated and we demonstrate an improvement with respect to the previous published results (SNLS1 and 2).

Paper Details

Date Published: 10 July 2018
PDF: 8 pages
Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107064E (10 July 2018); doi: 10.1117/12.2312003
Show Author Affiliations
B. Sassolas, LMA IN2P3, CNRS (France)
M. Betoule, LPNHE, IN2P3, CNRS, UPMC, UPD (France)
N. Regnault, LPNHE, IN2P3, CNRS, UPMC, UPD (France)
B. Lagrange, LMA IN2P3, CNRS (France)
D. Hofman, LMA IN2P3, CNRS (France)
L. Balzarini, LMA IN2P3, CNRS (France)
L. Pinard, LMA IN2P3, CNRS (France)
D. Forest, LMA IN2P3, CNRS (France)
G. Cagnoli, LMA, IN2P3, CNRS, UCBL (France)
J.-C. Cuillandre, CEA, IRFU, SAp, Lab. AIM Paris-Saclay, CNRS, INSU, Univ. Paris Diderot, Observatoire de Paris, PSL Research Univ. (France)
T. Benedict, CFHT Corp. (United States)

Published in SPIE Proceedings Vol. 10706:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
Ramón Navarro; Roland Geyl, Editor(s)

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