October
2026
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2026A&A...714A.150R
Authors
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Roudier, G. M.
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Seiffert, M.
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Barbier, R.
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Cillis, A.
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Gillard, W.
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Holmes, W.
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Jahnke, K.
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Kohley, R.
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Korngut, P. M.
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Kubik, B.
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Schirmer, M.
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Secroun, A.
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Wachter, S.
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Altieri, B.
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Amara, A.
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Andreon, S.
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Auricchio, N.
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Baccigalupi, C.
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Baldi, M.
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Balestra, A.
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Bardelli, S.
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Battaglia, P.
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Biviano, A.
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Branchini, E.
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Brescia, M.
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Camera, S.
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Cañas-Herrera, G.
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Capobianco, V.
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Carbone, C.
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Carretero, J.
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Castellano, M.
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Castignani, G.
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Cavuoti, S.
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Chambers, K. C.
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Cho, H.
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Cimatti, A.
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Colodro-Conde, C.
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Congedo, G.
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Conselice, C. J.
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Conversi, L.
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Copin, Y.
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Courbin, F.
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Courtois, H. M.
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Da Silva, A.
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Degaudenzi, H.
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De Lucia, G.
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Dole, H.
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Dubath, F.
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Ducret, F.
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Dupac, X.
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Dusini, S.
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Escoffier, S.
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Farina, M.
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Farinelli, R.
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Faustini, F.
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Ferriol, S.
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Fourmanoit, N.
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Frailis, M.
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Franceschi, E.
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Fumana, M.
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Galeotta, S.
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George, K.
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Gillis, B.
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Giocoli, C.
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Gracia-Carpio, J.
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Grazian, A.
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Grupp, F.
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Haugan, S. V. H.
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Hormuth, F.
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Hornstrup, A.
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Hudelot, P.
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Jhabvala, M.
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Keihänen, E.
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Kermiche, S.
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Kurki-Suonio, H.
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Laureijs, R.
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Le Brun, A. M. C.
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Le Mignant, D.
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Ligori, S.
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Lilje, P. B.
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Lindholm, V.
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Lloro, I.
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Mainetti, G.
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Maino, D.
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Maiorano, E.
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Mansutti, O.
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Marggraf, O.
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Martinelli, M.
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Martinet, N.
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Marulli, F.
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Massey, R. J.
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Medinaceli, E.
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Mei, S.
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Meneghetti, M.
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Merlin, E.
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Meylan, G.
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Mora, A.
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Moresco, M.
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Moscardini, L.
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Niemi, S.-M.
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Padilla, C.
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Paltani, S.
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Pasian, F.
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Pedersen, K.
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Pettorino, V.
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Pires, S.
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Polenta, G.
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Poncet, M.
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Popa, L. A.
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Raison, F.
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Renzi, A.
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Rhodes, J.
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Riccio, G.
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Romelli, E.
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Roncarelli, M.
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Rossetti, E.
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Saglia, R.
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Sakr, Z.
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Sapone, D.
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Sartoris, B.
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Schneider, P.
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Schrabback, T.
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Scodeggio, M.
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Seidel, G.
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Serrano, S.
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Sirignano, C.
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Skottfelt, J.
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Stanco, L.
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Steinwagner, J.
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Tallada-Crespí, P.
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Taylor, A. N.
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Teplitz, H. I.
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Tereno, I.
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Tessore, N.
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Toft, S.
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Toledo-Moreo, R.
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Torradeflot, F.
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Tutusaus, I.
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Valenziano, L.
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Valiviita, J.
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Vassallo, T.
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Verdoes Kleijn, G.
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Wang, Y.
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Weller, J.
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Zamorani, G.
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Martín-Fleitas, J.
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Scottez, V.
Abstract
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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.
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