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Burke, D. N. Spergel, D. T. Becker, D. Thomas, D. W. Gerdes, E. Bertin, E. Calabrese, E. Gaztanaga, E. J. Wollack, E. M. Vavagiakis, E. Rozo, E. R. Storer, E. Rykoff, E. Sanchez, E. Schaan, E. Suchyta, E. V. Denison, F. Menanteau, F. Nati, F. Paz-Chinch\\'on, G. C. Hilton, G. Gutierrez, G. M. Bernstein, G. Tarle, H. Miyatake, H. T. Diehl, H. Trac, I. Ferrero, J. A. Beall, J. Annis, J. Carretero, J. C. Hill, J. De Vicente, J. Dunkley, J. E. Austermann, J. E. Golec, J. Frieman, J. Garc\\'ia-Bellido, J. Gschwend, J. Hubmayr, J. Martin, J. McMahon, J. N. Ullom, J. Orlowski-Scherer, J. P. Dietrich, J. P. Hughes, J. R. Bond, J. Van Lanen, K. Honscheid, K. Knowles, K. Kuehn, K. M. Huffenberger, K. Moodley, K. T. Crowley, L. A. Page, L. B. Newburgh, L. N. da Costa, L. R. Vale, M. A. G. Maia, M. Aguena, M. B. Gralla, M. Carrasco Kind, M. Costanzi, M. D. Niemack, M. E. C. Swanson, M. Hasselfield, M. Hilton, M. J. Devlin, M. Lima, M. Lokken, M. Madhavacheril, M. Oguri, M. Salatino, M. Smith, M. Soares-Santos, N. Battaglia, N. C. Robertson, N. MacCrann, N. Sehgal, O. Lahav, P. A. Gallardo, P. Doel, P. Giles, P. Melchior, P. Phakathi, R. A. Gruendl, R. D\\\"unner, R.D. Wilkinson, R. L. C. Ogando, R. Miquel, R. Morgan, S. Adhikari, S. Aiola, S. Allam, S. Amodeo, S. Avila, S. Bhargava, S. Everett, S. Ferraro, S. Grandis, S. I. Loubser, S. K. Choi, S. Kent, S. M. Duff, S. M. Simon, S. Naess, S-P. P. Ho, S. R. Dicker, S. R. Hinton, S. Serrano, S. T. Staggs, T. A. Marriage, T. Bhandarkar, T. Jeltema, T. M. C. Abbott, T. Mroczkowski, T. Shin, W. G. Hartley, Y-T. Lin, Y. Zhang, Z. Xu","submitted_at":"2020-09-23T10:39:15Z","abstract_excerpt":"We present a catalog of 4195 optically confirmed Sunyaev-Zel'dovich (SZ) selected galaxy clusters detected with signal-to-noise > 4 in 13,211 deg$^2$ of sky surveyed by the Atacama Cosmology Telescope (ACT). 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