Flux reconstruction for the NIR camera CAGIRE at the focus of the Colibr\'i telescope
Alix Nouvel de la Fl\`eche, Jean-Luc Atteia, Herv\'e Valentin, Marie, Larrieu, J\'er\'emie Boy, Olivier Gravrand, Olivier Boulade, Jean-Claude, Clemens, Aur\'elia Secroun, Eric Kajfasz, Olivier Llido, St\'ephane Basa,, Fran\c{c}ois Dolon, Johan Floriot, Simona Lombardo
TL;DR
This paper discusses the flux reconstruction method for the CAGIRE near-infrared camera on the Colibr'i telescope, focusing on data preprocessing and flux recovery from ramp data.
Contribution
It introduces a novel method to recover pixel flux from ramp data in the CAGIRE NIR camera, enhancing data analysis accuracy.
Findings
Effective flux recovery from ramp data demonstrated
Improved preprocessing techniques for CAGIRE data
Potential for better astronomical observations
Abstract
CAGIRE is the near infrared camera of the Colibr\'i robotic telescope, designed for the follow-up of SVOM alerts. It is based on the ALFA 2k x 2k detector, from the LYNRED French Company, operating in "Up the Ramp" mode. An observation consists in a series of short (1-2 minutes) exposures during which the pixels are read out every 1.3 second, while continuously accumulating charges proportionally to the received flux. We discuss here the preprocessing of CAGIRE data and a method that can be used to recover the flux received by each pixel from the slope of the ramp.
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