Details

Autor(en) / Beteiligte

• Scaramella, R.
• Amiaux, J.
• Mellier, Y.
• Burigana, C.
• Carvalho, C. S.
• Cuillandre, J.-C.
• Da Silva, A.
• Derosa, A.
• Dinis, J.
• Maiorano, E.
• Maris, M.
• Tereno, I.
• Laureijs, R.
• Boenke, T.
• Buenadicha, G.
• Dupac, X.
• Gaspar Venancio, L. M.
• Gómez-Álvarez, P.
• Hoar, J.
• Lorenzo Alvarez, J.
• Racca, G. D.
• Saavedra-Criado, G.
• Schwartz, J.
• Vavrek, R.
• Schirmer, M.
• Aussel, H.
• Azzollini, R.
• Cardone, V. F.
• Cropper, M.
• Ealet, A.
• Garilli, B.
• Gillard, W.
• Granett, B. R.
• Guzzo, L.
• Hoekstra, H.
• Jahnke, K.
• Kitching, T.
• Maciaszek, T.
• Meneghetti, M.
• Miller, L.
• Nakajima, R.
• Niemi, S. M.
• Pasian, F.
• Percival, W. J.
• Pottinger, S.
• Sauvage, M.
• Scodeggio, M.
• Wachter, S.
• Zacchei, A.
• Aghanim, N.
• Amara, A.
• Auphan, T.
• Auricchio, N.
• Awan, S.
• Balestra, A.
• Bender, R.
• Bodendorf, C.
• Bonino, D.
• Branchini, E.
• Brau-Nogue, S.
• Brescia, M.
• Candini, G. P.
• Capobianco, V.
• Carbone, C.
• Carlberg, R. G.
• Carretero, J.
• Casas, R.
• Castander, F. J.
• Castellano, M.
• Cavuoti, S.
• Cimatti, A.
• Cledassou, R.
• Congedo, G.
• Conselice, C. J.
• Conversi, L.
• Copin, Y.
• Corcione, L.
• Costille, A.
• Courbin, F.
• Degaudenzi, H.
• Douspis, M.
• Dubath, F.
• Duncan, C. A. J.
• Dusini, S.
• Farrens, S.
• Ferriol, S.
• Fosalba, P.
• Fourmanoit, N.
• Frailis, M.
• Franceschi, E.
• Franzetti, P.
• Fumana, M.
• Gillis, B.
• Giocoli, C.
• Grazian, A.
• Grupp, F.
• Haugan, S. V. H.
• Holmes, W.
• Hormuth, F.
• Hudelot, P.

Titel

Euclid preparation: I. The Euclid Wide Survey

Ist Teil von

• Astronomy and astrophysics (Berlin), 2022-06, Vol.662, p.A112

Ort / Verlag

EDP Sciences

Erscheinungsjahr

2022

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Euclid is a mission of the European Space Agency that is designed to constrain the properties of dark energy and gravity via weak gravitational lensing and galaxy clustering. It will carry out a wide area imaging and spectroscopy survey (the Euclid Wide Survey: EWS) in visible and near-infrared bands, covering approximately 15 000 deg 2 of extragalactic sky in six years. The wide-field telescope and instruments are optimised for pristine point spread function and reduced stray light, producing very crisp images. This paper presents the building of the Euclid reference survey: the sequence of pointings of EWS, deep fields, and calibration fields, as well as spacecraft movements followed by Euclid as it operates in a step-and-stare mode from its orbit around the Lagrange point L2. Each EWS pointing has four dithered frames; we simulated the dither pattern at the pixel level to analyse the effective coverage. We used up-to-date models for the sky background to define the Euclid region-of-interest (RoI). The building of the reference survey is highly constrained from calibration cadences, spacecraft constraints, and background levels; synergies with ground-based coverage were also considered. Via purposely built software, we first generated a schedule for the calibrations and deep fields observations. On a second stage, the RoI was tiled and scheduled with EWS observations, using an algorithm optimised to prioritise the best sky areas, produce a compact coverage, and ensure thermal stability. The result is the optimised reference survey RSD_2021A, which fulfils all constraints and is a good proxy for the final solution. The current EWS covers ≈14 500 deg 2 . The limiting AB magnitudes (5 σ point-like source) achieved in its footprint are estimated to be 26.2 (visible band I E ) and 24.5 (for near infrared bands Y E , J E , H E ); for spectroscopy, the H α line flux limit is 2 × 10 −16 erg −1 cm −2 s −1 at 1600 nm; and for diffuse emission, the surface brightness limits are 29.8 (visible band) and 28.4 (near infrared bands) mag arcsec −2 .