The Atacama Cosmology Telescope: DR4 maps and cosmological parameters by Aiola, S, Calabrese, E, Maurin, L, Naess, S, Schmitt, BL, Abitbol, MH, Addison, GE, Ade, PAR, Alonso, D, Amiri, M, Amodeo, S, Angile, E, Austermann, JE, Baildon, T, Battaglia, N, Beall, JA, Bean, R, Becker, DT, Bond, JR, Bruno, SM, Calafut, V, Campusano, LE, Carrero, F, Chesmore, GE, Cho, H-M, Choi, SK, Clark, SE, Cothard, NF, Crichton, D, Crowley, KT, Darwish, O, Datta, R, Denison, EV, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Essinger-Hileman, T, Fankhanel, M, Ferraro, S, Fox, AE, Fuzia, B, Gallardo, PA, Gluscevic, V, Golec, JE, Grace, E, Gralla, M, Guan, Y