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Navarro-Alsina, A. N. Taylor, A. Pezzotta, A. Pisani, A. R. Cooray, A. Renzi, A. Schneider, A. Secroun, A. Shulevski, A. Troja, A. Venhola, A. Veropalumbo, A. Viitanen, A. Zacchei, B. Altieri, B. Camacho Quevedo, B. Gillis, B. Kubik, B. Laloux, B. Margalef-Bentabol, B. R. Granett, B. Rusholme, B. Sartoris, C. A. J. Duncan, C. Baccigalupi, C. Benoist, C. Burigana, C. Carbone, C. C. Kirkpatrick, C. Colodro-Conde, C. Dolding, C. Giocoli, C. Hern\\'andez-Monteagudo, C. J. A. P. Martins, C. J. Conselice, C. M. Gutierrez, C. Moretti, C. Murray, C. Neissner, C. Padilla, C. Porciani, C. Saulder, C. S. Carvalho, C. Sirignano, C. Valieri, D. Bertacca, D. B. Sanders, D. C. Masters, D. Di Ferdinando, D. Karagiannis, D. Le Mignant, D. Maino, D. M. Alexander, D. Potter, D. Sapone, D. Sciotti, D. Scott, D. Sluse, D. Vergani, E. A. Magnier, E. Bozzo, E. Branchini, E. Franceschi, E. Gaztanaga, E. Keih\\\"anen, E. Maiorano, E. Medinaceli, E. Merlin, E. Romelli, E. Rossetti, E. Sarpa, E. Sellentin, E. Soubrie, Euclid Collaboration: T. Matamoro Zatarain, E. Zucca, F. Atrio-Barandela, F. Caro, F. Cogato, F. Courbin, F. De Paolis, F. Dubath, F. Faustini, F. Finelli, F. Fontanot, F. Giacomini, F. Gianotti, F. Grupp, F. Hormuth, F. J. Castander, F. La Franca, F. Lepori, F. Mannucci, F. Marulli, F. M. Zerbi, F. Pasian, F. Passalacqua, F. Raison, F. Ricci, F. Shankar, F. Tarsitano, F. Torradeflot, G. Ca\\~nas-Herrera, G. Castignani, G. Congedo, G. De Lucia, G. Desprez, G. Fabbian, G. F. Lesci, G. Gozaliasl, G. Leroy, G. Maggio, G. Mainetti, G. Meylan, G. Morgante, G. Polenta, G. Riccio, G. Rodighiero, G. Seidel, G. Sirri, G. Stevens, G. Testera, G. Verdoes Kleijn, G. Verza, G. Zamorani, H. Aussel, H. B\\\"ohringer, H. Degaudenzi, H. Dole, H. Hildebrandt, H. Hoekstra, H. J. A. Rottgering, H. Kurki-Suonio, H. Landt, H. M. Courtois, I. A. Zinchenko, I. Lloro, I. M. Hook, I. Risso, I. T. Andika, I. Tereno, I. Tutusaus, J. A. Escartin Vigo, J. A. Schewtschenko, J. Brinchmann, J. Calhau, J. Carretero, J. Garc\\'ia-Bellido, J. Gracia-Carpio, J. Hjorth, J. J. Diaz, J. J. E. Kajava, J. Lesgourgues, J. Macias-Perez, J. Mart\\'in-Fleitas, J. M. Diego, J. Rhodes, J. Skottfelt, J. Steinwagner, J. Valiviita, J. Weller, J. W. Nightingale, K. Benson, K. C. Chambers, K. Ganga, K. George, K. Jahnke, K. Kiiveri, K. Naidoo, K. Paterson, K. Pedersen, K. Tanidis, L. A. Popa, L. Bisigello, L. Blot, L. Conversi, L. C. Smith, L. Gabarra, L. Legrand, L. Leuzzi, L. Maurin, L. Moscardini, L. Patrizii, L. Pozzetti, L. Spinoglio, L. Stanco, L. Valenziano, L. Wang, M. Archidiacono, M. Baldi, M. Ballardini, M. Bethermin, M. Bolzonella, M. Brescia, M. B. Taylor, M. Castellano, M. Cropper, M. Fabricius, M. Farina, M. Frailis, M. Giulietti, M. Guidi, M. Jhabvala, M. K\\\"ummel, M. Kunz, M. L. Brown, M. Lembo, M. Magliocchetti, M. Martinelli, M. Melchior, M. Meneghetti, M. Mezcua, M. Miluzio, M. Moresco, M. N. Bremer, M. Poncet, M. P\\\"ontinen, M. Radovich, M. Roncarelli, M. Sahl\\'en, M. Salvato, M. Schultheis, M. Scialpi, M. Scodeggio, M. Seiffert, M. Selwood, M. Sereno, M. Siudek, M. Tenti, M. Tucci, M. Viel, M. Wiesmann, N. Aghanim, N. Auricchio, N. A. Walton, N. Fourmanoit, N. Martinet, N. Mauri, O. Cucciati, O. Mansutti, O. Marggraf, P.-A. Duc, P. Battaglia, P. B. Lilje, P. Dayal, P.-F. Rocci, P. G\\'omez-Alvarez, P. Hudelot, P. Liebing, P. Monaco, P. Schneider, P. Simon, P. Tallada-Cresp\\'i, P. Vielzeuf, Q. Le Boulc'h, R. A. Shaw, R. B. Metcalf, R. Cabanac, R. Farinelli, R. Maoli, R. Massey, R. Nakajima, R. Rebolo, R. Saglia, R. Shirley, R. Teyssier, R. Toledo-Moreo, S. Andreon, S. Anselmi, S. A. Stanford, S. Bardelli, S. Bruton, S. Camera, S. Casas, S. Cavuoti, S. Davini, S. Di Domizio, S. Dusini, S. Escoffier, S. Ferriol, S. Fotopoulou, S. Galeotta, S. Gwyn, S. Hemmati, S. Kermiche, S. Kruk, S. Ligori, S. Marcin, S. Matthew, S. Maurogordato, S. Mei, S.-M. Niemi, S. Nesseris, S. Paltani, S. Pires, S. Quai, S. Sacquegna, S. Serrano, S. Toft, S. Tosi, S. V. H. Haugan, T. Castro, T. Contini, T. Gasparetto, T. I. Liaudat, T. Schrabback, T. Vassallo, V. Allevato, V. Capobianco, V. Gautard, V. Kansal, V. Lindholm, V. Pettorino, V. Scottez, W. G. Hartley, W. Holmes, W. J. Percival, W. Roster, X. Dupac, X. Lopez Lopez, Y. Akrami, Y. Copin, Y. Fang, Y. Fu, Y. Kang, Y. Mellier, Y. Toba, Y. Wang, Z. Sakr","submitted_at":"2025-03-19T15:27:15Z","abstract_excerpt":"We present a catalogue of candidate active galactic nuclei (AGN) in the $Euclid$ Quick Release (Q1) fields. For each $Euclid$ source we collect multi-wavelength photometry and spectroscopy information from Galaxy Evolution Explorer (GALEX), $Gaia$, Dark Energy Survey (DES), Wise-field Infrared Survey Explorer (WISE), $Spitzer$, Dark Energy Survey (DESI), and Sloan Digital Sky Survey (SDSS), including spectroscopic redshift from public compilations. 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Legrand, L. Leuzzi, L. Maurin, L. Moscardini, L. Patrizii, L. Pozzetti, L. Spinoglio, L. Stanco, L. Valenziano, L. Wang, M. Archidiacono, M. Baldi, M. Ballardini, M. Bethermin, M. Bolzonella, M. Brescia, M. B. Taylor, M. Castellano, M. Cropper, M. Fabricius, M. Farina, M. Frailis, M. Giulietti, M. Guidi, M. Jhabvala, M. K\\\"ummel, M. Kunz, M. L. Brown, M. Lembo, M. Magliocchetti, M. Martinelli, M. Melchior, M. Meneghetti, M. Mezcua, M. Miluzio, M. Moresco, M. N. Bremer, M. Poncet, M. P\\\"ontinen, M. Radovich, M. Roncarelli, M. Sahl\\'en, M. Salvato, M. Schultheis, M. Scialpi, M. Scodeggio, M. Seiffert, M. Selwood, M. Sereno, M. Siudek, M. Tenti, M. Tucci, M. Viel, M. Wiesmann, N. Aghanim, N. Auricchio, N. A. Walton, N. Fourmanoit, N. Martinet, N. Mauri, O. Cucciati, O. Mansutti, O. Marggraf, P.-A. Duc, P. Battaglia, P. B. Lilje, P. Dayal, P.-F. Rocci, P. G\\'omez-Alvarez, P. Hudelot, P. Liebing, P. Monaco, P. Schneider, P. Simon, P. Tallada-Cresp\\'i, P. Vielzeuf, Q. Le Boulc'h, R. 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