Toward a universal characterization methodology for conversion gain measurement of CMOS APS: application to Euclid and SVOM

TL;DR

This paper introduces a universal methodology for characterizing the conversion gain of CMOS APS detectors, validated on detectors used in Euclid and SVOM missions, enhancing accuracy in flux estimation for astronomical instruments.

Contribution

It presents a new, universally applicable framework for IR hybrid detector characterization, addressing intrinsic property decorrelation and validation on real detectors.

Findings

Validated methods on Euclid's H2RG detector

Identified subtle detector behaviors

Enhanced flux estimation accuracy

Abstract

With the expanding integration of infrared instruments in astronomical missions, accurate per-pixel flux estimation for near-infrared hybrid detectors has become critical to the success of these missions. Based on CPPM's involvement in both SVOM/Colibri and Euclid missions, this study introduces universally applicable methods and framework for characterizing IR hybrid detectors and decorrelating their intrinsic properties. The characterization framework, applied to the ALFA detector and \Euclid's H2RG, not only validates the proposed methods but also points out subtle behaviors inherent to each detector.