Euclid: Estimation of the Impact of Correlated Readout Noise for Flux Measurements with the Euclid NISP Instrument
Creators
- Jiménez Muñoz, A.
-
Macías-Pérez, J.
- Secroun, A.
- Gillard, W.
- Kubik, B.
- Auricchio, N.
- Balestra, A.
- Bodendorf, C.
- Bonino, D.
- Branchini, E.
- Brescia, M.
- Brinchmann, J.
- Capobianco, V.
- Carbone, C.
- Carretero, J.
- Casas, R.
- Castellano, M.
- Cavuoti, S.
- Cimatti, A.
- Cledassou, R.
- Congedo, G.
- Conversi, L.
- Copin, Y.
- Corcione, L.
- Costille, A.
- Cropper, M.
- Degaudenzi, H.
- Douspis, M.
- Dubath, F.
- Dusini, S.
- Ealet, A.
- Franceschi, E.
- Franzetti, P.
- Fumana, M.
- Garilli, B.
- Gillis, B.
- Giocoli, C.
- Grazian, A.
- Grupp, F.
- Haugan, S. V. H.
- Holmes, W.
- Hormuth, F.
- Jahnke, K.
- Kermiche, S.
- Kiessling, A.
- Kilbinger, M.
- Kümmel, M.
- Kunz, M.
- Kurki-Suonio, H.
- Laureijs, R.
- Ligori, S.
- Lilje, P. B.
- Lloro, I.
- Maiorano, E.
- Mansutti, O.
- Marggraf, O.
- Markovic, K.
- Massey, R.
- Medinaceli, E.
- Mei, S.
-
Meneghetti, M.
- Meylan, G.
- Moscardini, L.
- Niemi, S. M.
- Padilla, C.
- Paltani, S.
- Pasian, F.
- Pedersen, K.
- Percival, W. J.
- Pires, S.
- Polenta, G.
- Poncet, M.
- Popa, L.
- Pozzetti, L.
- Raison, F.
- Rebolo, R.
- Roncarelli, M.
- Rossetti, E.
- Saglia, R.
- Sauvage, M.
- Scaramella, R.
- Schneider, P.
- Seidel, G.
- Serrano, S.
- Sirignano, C.
- Sirri, G.
- Tavagnacco, D.
- Taylor, A. N.
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Teplitz, H. I.
- Tereno, I.
- Toledo-Moreo, R.
- Valenziano, L.
- Vassallo, T.
- Verdoes Kleijn, G. A.
-
Wang, Y.
- Weller, J.
- Wetzstein, M.
- Zamorani, G.
- Zoubian, J.
- Euclid Consortium
Abstract
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)^α-like noise model and fit the model parameters to the data, obtaining typical values of σ = 19.7^(+1.1)_(−0.8) e⁻ Hz^(−0.5), f_(knee) = (5.2^(+1.8)_(−1.3))×10⁻³ Hz and α = 1.24^(+0.26)_(−0.21). 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.
Additional Information
© 2021. The Astronomical Society of the Pacific. Received 2021 May 3; accepted 2021 August 23; published 2021 September 17. The Euclid Consortium acknowledges the European Space Agency and a number of agencies and institutes that have supported the development of Euclid, in particular, the Academy of Finland, the Agenzia Spaziale Italiana, the Belgian Science Policy, the Canadian Euclid Consortium, the Centre National dEtudes Spatiales, the Deutsches Zentrum für Luft- und Raumfahrt, the Danish Space Research Institute, the Fundação para a Ciência e a Tecnologia, the Ministerio de Economia y Competitividad, the National Aeronautics and Space Administration, the Netherlandse Onderzoekschool Voor Astronomie, the Norwegian Space Agency, the Romanian Space Agency, the State Secretariat for Education, Research and Innovation (SERI) at the Swiss Space Office (SSO), and the United Kingdom Space Agency. A complete and detailed list is available on the Euclid website (http://www.euclid-ec.org).Attached Files
Submitted - 2104.12752.pdf
Files
2104.12752.pdf
Additional details
Identifiers
- Eprint ID
- 111162
- DOI
- 10.1088/1538-3873/ac21de
- Resolver ID
- CaltechAUTHORS:20211001-213811722
Related works
- Describes
- 10.1088/1538-3873/ac21de (DOI)
- https://arxiv.org/abs/2104.12752 (URL)
Funding
- European Space Agency (ESA)
- Academy of Finland
- Agenzia Spaziale Italiana (ASI)
- Belgian Federal Science Policy Office (BELSPO)
- Canadian Euclid Consortium
- Centre National d'Études Spatiales (CNES)
- Deutsches Zentrum für Luft- und Raumfahrt (DLR)
- Danish Space Research Institute
- Fundação para a Ciência e a Tecnologia (FCT)
- Ministerio de Economia y Competitividad (MINECO)
- NASA
- Nederlandse Onderzoekschool Voor Astronomie (NOVA)
- Norwegian Space Agency
- Romanian Space Agency
- State Secretariat for Education, Research and Innovation (SERI)
- Swiss Space Office (SSO)
- United Kingdom Space Agency (UKSA)
Dates
- Created
-
2021-10-04Created from EPrint's datestamp field
- Updated
-
2021-10-04Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)