Euclid: Pixel-to-pixel readout noise correlation in HAWAII-2RG detectors

@article{roudier2026euclid,
  title = {{Euclid: Pixel-to-pixel readout noise correlation in HAWAII-2RG detectors}},
  author = {G.M Roudier and M Seiffert and R Barbier and A Cillis and W Gillard and W Holmes and K Jahnke and R Kohley and P.M Korngut and B Kubik and M Schirmer and A Secroun and S Wachter and B Altieri and A Amara and S Andreon and N Auricchio and C Baccigalupi and M Baldi and A Balestra and S Bardelli and P Battaglia and A Biviano and E Branchini and M Brescia and S Camera and G Cañas-Herrera and V Capobianco and C Carbone and J Carretero and M Castellano and G Castignani and S Cavuoti and K.C Chambers and H Cho and A Cimatti and C Colodro-Conde and G Congedo and C.J Conselice and L Conversi and Y Copin and F Courbin and H.M Courtois and A da Silva and H Degaudenzi and G de Lucia and H Dole and F Dubath and F Ducret and X Dupac and S Dusini and S Escoffier and M Farina and R Farinelli and F Faustini and S Ferriol and N Fourmanoit and M Frailis and E Franceschi and M Fumana},
  journal = {Astronomy \& Astrophysics - A\&A},
  year = {2026},
  month = oct,
  doi = {10.1051/0004-6361/202558417},
  url = {https://hal.science/hal-05834833v1},
  note = {CC BY 4.0},
}

TY  - JOUR
TI  - Euclid: Pixel-to-pixel readout noise correlation in HAWAII-2RG detectors
AU  - G.M Roudier
AU  - M Seiffert
AU  - R Barbier
AU  - A Cillis
AU  - W Gillard
AU  - W Holmes
AU  - K Jahnke
AU  - R Kohley
AU  - P.M Korngut
AU  - B Kubik
AU  - M Schirmer
AU  - A Secroun
AU  - S Wachter
AU  - B Altieri
AU  - A Amara
AU  - S Andreon
AU  - N Auricchio
AU  - C Baccigalupi
AU  - M Baldi
AU  - A Balestra
AU  - S Bardelli
AU  - P Battaglia
AU  - A Biviano
AU  - E Branchini
AU  - M Brescia
AU  - S Camera
AU  - G Cañas-Herrera
AU  - V Capobianco
AU  - C Carbone
AU  - J Carretero
AU  - M Castellano
AU  - G Castignani
AU  - S Cavuoti
AU  - K.C Chambers
AU  - H Cho
AU  - A Cimatti
AU  - C Colodro-Conde
AU  - G Congedo
AU  - C.J Conselice
AU  - L Conversi
AU  - Y Copin
AU  - F Courbin
AU  - H.M Courtois
AU  - A da Silva
AU  - H Degaudenzi
AU  - G de Lucia
AU  - H Dole
AU  - F Dubath
AU  - F Ducret
AU  - X Dupac
AU  - S Dusini
AU  - S Escoffier
AU  - M Farina
AU  - R Farinelli
AU  - F Faustini
AU  - S Ferriol
AU  - N Fourmanoit
AU  - M Frailis
AU  - E Franceschi
AU  - M Fumana
PY  - 2026
DA  - 2026/10/22
JO  - Astronomy & Astrophysics - A&A
DO  - 10.1051/0004-6361/202558417
UR  - https://hal.science/hal-05834833v1
AB  - We investigated the pixel-to-pixel noise correlations of HAWAII-2RG (H2RG) detectors using data from preflight testing performed for Euclid. We find that the detectors – in the absence of input signal, with and without the focal plane electronics that will be used on board Euclid – carry pixel-to-pixel noise correlations with varying amplitude across our sample of 23 detectors. We find a baseline level of order 10%, but with variations among detectors and portions of a given detector. We also observe occasional, significantly higher levels, which we attribute to fluctuations in alternative column noise. These fluctuations affect approximately a tenth of the total number of exposures and result in Pearson correlation coefficient values as high as 40% for the worst cases. While our sample of detectors is specific to Euclid, we expect our results to apply in general to the family of H2RG detectors, widely used in infrared astronomy.
SN  - 0004-6361
SN  - 1432-0746
ER  -