Characterisation Methodology for Persistence and Anti-persistence in IR Detectors for the Euclid and SVOM Space Missions

@misc{araujo2026characterisation,
  title = {{Characterisation Methodology for Persistence and Anti-persistence in IR Detectors for the Euclid and SVOM Space Missions}},
  author = {Naomie De Araujo and Aurélia Secroun and Marie Tourneur Silvain and Éric Kajfasz and Eliott Robineau and Alioune Diop},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.02860},
  eprint = {2611.02860},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.02860},
  note = {CC BY-NC-SA 4.0},
}

TY  - UNPB
TI  - Characterisation Methodology for Persistence and Anti-persistence in IR Detectors for the Euclid and SVOM Space Missions
AU  - Naomie De Araujo
AU  - Aurélia Secroun
AU  - Marie Tourneur Silvain
AU  - Éric Kajfasz
AU  - Eliott Robineau
AU  - Alioune Diop
PY  - 2026
DA  - 2026/11/02
PB  - arXiv
DO  - 10.48550/arxiv.2611.02860
UR  - https://arxiv.org/abs/2611.02860
AB  - H2RG and ALFA are the infrared detectors used in the Euclid and SVOM space missions. These types of detectors may be affected by persistence and anti-persistence, phenomena that distort pixel responses after exposure to light due to simultaneous trapping and release of charges within the pixel. These phenomena have shown to cause biases in flux measurements and potentially false detections, among other effects. This article presents a universal methodology for characterising persistence and anti-persistence using differential ramps, Savitzky--Golay filtering, and non-linearity correction. When applied to ground characterisation data, this approach reveals spatial inhomogeneities, environmental dependencies (in particular fluence, flux, temperature and wavelength), and unexpected spectral effects in ALFA. These preliminary results validate the method and pave the way for in-flight correction models capable of meeting the missions' accuracy requirements.
ER  -