Measurement of telescope transmission using a Collimated Beam Projector
Abstract
The number of type Ia supernova observations will see a significant growth within the next decade, especially thanks to the Legacy Survey of Space and Time undertaken by the Vera Rubin Observatory in Chile. With this rise, the statistical uncertainties will decrease and the flux calibration will become the main uncertainty for the characterization of dark energy. The uncertainty over the telescope transmission is a major systematic when measuring SNe Ia colors. Here we introduce the Collimated Beam Projector (CBP), a device that can measure the transmission of a telescope and its filters. Composed of a tunable monochromatic light source and optics to provide a parallel output beam this device is able to measure with high precision the filter transmissions. In the following, we will show how measuring precisely a telescope transmission can also improve the precision of the dark energy parameters. As an example, we will present the first results of the CBP in the context of the StarDice experiment.
Keywords
Cite
@article{arxiv.2206.07530,
title = {Measurement of telescope transmission using a Collimated Beam Projector},
author = {Thierry Souverin and Jérémy Neveu and Marc Betoule and Sébastien Bongard and Sasha Brownsberger and Johann Cohen-Tanugi and Sylvie Dagoret-Campagne and Fabrice Feinstein and Claire Juramy and Laurent Le Guillou and Auguste Le Van Suu and Pierre Eric Blanc and François Hazenberg and Eric Nuss and Bertrand Plez and Eduardo Sepulveda and Kélian Sommer and Christopher Stubbs and Nicolas Regnault and Elana Urbach},
journal= {arXiv preprint arXiv:2206.07530},
year = {2024}
}
Comments
2 pages, 2 figures, contribution to the 2022 Cosmology session of the 56th Rencontres de Moriond