February
2022
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2022A&A...658A.126E
Authors
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Euclid Collaboration
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Moneti, A.
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McCracken, H. J.
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Shuntov, M.
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Kauffmann, O. B.
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Capak, P.
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Davidzon, I.
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Ilbert, O.
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Scarlata, C.
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Toft, S.
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Weaver, J.
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Chary, R.
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Cuby, J.
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Faisst, A. L.
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Masters, D. C.
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McPartland, C.
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Mobasher, B.
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Sanders, D. B.
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Scaramella, R.
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Stern, D.
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Szapudi, I.
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Teplitz, H.
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Zalesky, L.
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Amara, A.
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Auricchio, N.
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Bodendorf, C.
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Bonino, D.
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Branchini, E.
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Brau-Nogue, S.
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Brescia, M.
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Brinchmann, J.
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Capobianco, V.
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Carbone, C.
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Carretero, J.
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Castander, F. J.
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Castellano, M.
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Cavuoti, S.
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Cimatti, A.
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Cledassou, R.
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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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Corcione, L.
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Costille, A.
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Cropper, M.
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Da Silva, A.
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Degaudenzi, H.
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Douspis, M.
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Dubath, F.
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Duncan, C. A. J.
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Dupac, X.
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Dusini, S.
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Farrens, S.
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Ferriol, S.
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Fosalba, P.
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Frailis, M.
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Franceschi, E.
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Fumana, M.
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Garilli, B.
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Gillis, B.
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Giocoli, C.
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Granett, B. R.
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Grazian, A.
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Grupp, F.
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Haugan, S. V. H.
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Hoekstra, H.
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Holmes, W.
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Hormuth, F.
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Hudelot, P.
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Jahnke, K.
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Kermiche, S.
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Kiessling, A.
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Kilbinger, M.
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Kitching, T.
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Kohley, R.
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Kümmel, M.
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Kunz, M.
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Kurki-Suonio, H.
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Ligori, S.
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Lilje, P. B.
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Lloro, I.
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Maiorano, E.
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Mansutti, O.
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Marggraf, O.
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Markovic, K.
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Marulli, F.
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Massey, R.
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Maurogordato, S.
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Meneghetti, M.
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Merlin, E.
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Meylan, G.
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Moresco, M.
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Moscardini, L.
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Munari, E.
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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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Pires, S.
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Poncet, M.
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Popa, L.
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Pozzetti, L.
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Raison, F.
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Rebolo, R.
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Rhodes, J.
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Rix, H.
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Roncarelli, M.
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Rossetti, E.
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Saglia, R.
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Schneider, P.
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Secroun, A.
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Seidel, G.
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Serrano, S.
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Sirignano, C.
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Sirri, G.
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Stanco, L.
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Tallada-Crespí, P.
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Taylor, A. N.
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Tereno, I.
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Toledo-Moreo, R.
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Torradeflot, F.
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Wang, Y.
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Welikala, N.
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Weller, J.
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Zamorani, G.
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Zoubian, J.
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Andreon, S.
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Bardelli, S.
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Camera, S.
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Graciá-Carpio, J.
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Medinaceli, E.
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Mei, S.
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Polenta, G.
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Romelli, E.
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Sureau, F.
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Tenti, M.
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Vassallo, T.
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Zacchei, A.
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Zucca, E.
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Baccigalupi, C.
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Balaguera-Antolínez, A.
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Bernardeau, F.
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Biviano, A.
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Bolzonella, M.
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Bozzo, E.
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Burigana, C.
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Cabanac, R.
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Cappi, A.
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Carvalho, C. S.
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Casas, S.
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Castignani, G.
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Colodro-Conde, C.
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Coupon, J.
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Courtois, H. M.
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Di Ferdinando, D.
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Farina, M.
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Finelli, F.
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Flose-Reimberg, P.
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Fotopoulou, S.
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Galeotta, S.
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Ganga, K.
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Garcia-Bellido, J.
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Gaztanaga, E.
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Gozaliasl, G.
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Hook, I.
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Joachimi, B.
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Kansal, V.
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Keihanen, E.
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Kirkpatrick, C. C.
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Lindholm, V.
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Mainetti, G.
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Maino, D.
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Maoli, R.
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Martinelli, M.
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Martinet, N.
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Maturi, M.
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Metcalf, R. B.
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Morgante, G.
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Morisset, N.
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Nucita, A.
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Patrizii, L.
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Potter, D.
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Renzi, A.
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Riccio, G.
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Sánchez, A. G.
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Sapone, D.
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Schirmer, M.
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Schultheis, M.
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Scottez, V.
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Sefusatti, E.
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Teyssier, R.
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Tubio, O.
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Tutusaus, I.
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Valiviita, J.
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Viel, M.
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Hildebrandt, H.
Abstract
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We present a new infrared survey covering the three Euclid deep fields and four other Euclid calibration fields using Spitzer Space Telescope's Infrared Array Camera (IRAC). We combined these new observations with all relevant IRAC archival data of these fields in order to produce the deepest possible mosaics of these regions. In total, these observations represent nearly 11 % of the total Spitzer Space Telescope mission time. The resulting mosaics cover a total of approximately 71.5 deg2 in the 3.6 and 4.5 μm bands, and approximately 21.8 deg2 in the 5.8 and 8 μm bands. They reach at least 24 AB magnitude (measured to 5σ, in a 2″.5 aperture) in the 3.6 μm band and up to ∼5 mag deeper in the deepest regions. The astrometry is tied to the Gaia astrometric reference system, and the typical astrometric uncertainty for sources with 16 < [3.6]< 19 is ≲0″.15. The photometric calibration is in excellent agreement with previous WISE measurements. We extracted source number counts from the 3.6 μm band mosaics, and they are in excellent agreement with previous measurements. Given that the Spitzer Space Telescope has now been decommissioned, these mosaics are likely to be the definitive reduction of these IRAC data. This survey therefore represents an essential first step in assembling multi-wavelength data on the Euclid deep fields, which are set to become some of the premier fields for extragalactic astronomy in the 2020s.
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