Euclid: Estimation of the impact of correlated readout noise for flux measurements with the euclid NISP instrument

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Jiménez Muñoz, A (Author) Other; Macías Pérez, J (Author) Other; Secroun, A (Author) Other; Gillard, W (Author) Other; Kubik, B (Author) Other; Auricchio, N (Author) Other; Balestra, A (Author) Other; Bodendorf, C (Author) Other; Bonino, D (Author) Other; Branchini, E (Author) Other; Brescia, M (Author) Other; J. Brinchmann (Author) FCUP; Capobianco, V (Author) Other; Carbone, C (Author) Other; Carretero, J (Author) Other; Casas, R (Author) Other; Castellano, M (Author) Other; Cavuoti, S (Author) Other; Cimatti, A (Author) Other; Cledassou, R (Author) Other; Congedo, G (Author) Other; Conversi, L (Author) Other; Copin, Y (Author) Other; Corcione, L (Author) Other; Costille, A (Author) Other; Cropper, M (Author) Other; Degaudenzi, H (Author) Other; Douspis, M (Author) Other; Dubath, F (Author) Other; Dusini, S (Author) Other; Ealet, A (Author) Other; Franceschi, E (Author) Other; Franzetti, P (Author) Other; Fumana, M (Author) Other; Garilli, B (Author) Other; Gillis, B (Author) Other; Giocoli, C (Author) Other; Grazian, A (Author) Other; Grupp, F (Author) Other; Haugan, SVH (Author) Other; Holmes, W (Author) Other; Hormuth, F (Author) Other; Jahnke, K (Author) Other; Kermiche, S (Author) Other; Kiessling, A (Author) Other; Kilbinger, M (Author) Other; Kümmel, M (Author) Other; Kunz, M (Author) Other; Kurki Suonio, H (Author) Other; Laureijs, R (Author) Other; Ligori, S (Author) Other; Lilje, PB (Author) Other; Lloro, I (Author) Other; Maiorano, E (Author) Other; Mansutti, O (Author) Other; Marggraf, O (Author) Other; Markovic, K (Author) Other; Massey, R (Author) Other; Medinaceli, E (Author) Other; Mei, S (Author) Other; Meneghetti, M (Author) Other; Meylan, G (Author) Other; Moscardini, L (Author) Other; Niemi, SM (Author) Other; Padilla, C (Author) Other; Paltani, S (Author) Other; Pasian, F (Author) Other; Pedersen, K (Author) Other; Percival, WJ (Author) Other; Pires, S (Author) Other; Polenta, G (Author) Other; Poncet, M (Author) Other; Popa, L (Author) Other; Pozzetti, L (Author) Other; Raison, F (Author) Other; Rebolo, R (Author) Other; Roncarelli, M (Author) Other; Rossetti, E (Author) Other; Saglia, R (Author) Other; Sauvage, M (Author) Other; Scaramella, R (Author) Other; Schneider, P (Author) Other; Seidel, G (Author) Other; Serrano, S (Author) Other; Sirignano, C (Author) Other; Sirri, G (Author) Other; Tavagnacco, D (Author) Other; Taylor, AN (Author) Other; Teplitz, HI (Author) Other; Tereno, I (Author) Other; Toledo Moreo, R (Author) Other; Valenziano, L (Author) Other; Vassallo, T (Author) Other; Verdoes Kleijn, GA (Author) Other; Wang, Y (Author) Other; Weller, J (Author) Other; Wetzstein, M (Author) Other; Zamorani, G (Author) Other; Zoubian, J (Author) Other

Journal

Title: Publications of the Astronomical Society of the Pacific

Vol. 133

ISSN: 0004-6280

Publisher: Institute of Physics Publishing

Indexing

Scopus - 1 Citation

Other information

Authenticus ID: P-00V-JY5

DOI: 10.1088/1538-3873/ac21de

Abstract (EN): The Euclid satellite, to be launched by ESA in 2022, will be a major instrument for cosmology for the next decades. Euclid is composed of two instruments: The Visible instrument and the Near Infrared Spectrometer and Photometer (NISP). In this work, we estimate the implications of correlated readout noise in the NISP detectors for the final in-flight flux measurements. Considering the multiple accumulated readout mode, for which the UTR (Up The Ramp) exposure frames are averaged in groups, we derive an analytical expression for the noise covariance matrix between groups in the presence of correlated noise. We also characterize the correlated readout noise properties in the NISP engineering-grade detectors using long dark integrations. For this purpose, we assume a (1/f ) ¿-like noise model and fit the model parameters to the data, obtaining typical values of s = - 19.7+0.8 1.1 e¿ Hz¿0.5, = ( - ) f 5.2+ 10- Hz knee 1.3 1.8 3 and a = - 1.24+0.21 0.26. Furthermore, via realistic simulations and using a maximum likelihood flux estimator we derive the bias between the input flux and the recovered one. We find that using our analytical expression for the covariance matrix of the correlated readout noise we diminish this bias by up to a factor of four with respect to the white noise approximation for the covariance matrix. Finally, we conclude that the final bias on the in-flight NISP flux measurements should still be negligible even in the white readout noise approximation, which is taken as a baseline for the Euclid on-board processing to estimate the on-sky flux. Unified Astronomy Thesaurus concepts: Infrared photometry (792); Infrared Astronomical Satellite (785).

Language: English

Type (Professor's evaluation): Scientific