The Atacama Cosmology Telescope: a measurement of the Cosmic Microwave Background power spectra at 98 and 150 GHz
Authors: Choi Steve K. , Hasselfield Matthew , Ho Shuay-Pwu Patty , Koopman Brian , Lungu Marius , Abitbol Maximilian H. , Addison Graeme E. , Ade Peter A. R. , Aiola Simone , Alonso David , Amiri Mandana , Amodeo Stefania , Angile Elio , Austermann Jason E. , Baildon Taylor , Battaglia Nick , Beall James A. , Bean Rachel , Becker Daniel T. , Bond J Richard , Bruno Sarah Marie , Calabrese Erminia , Calafut Victoria , Campusano Luis E. , Carrero Felipe , Chesmore Grace E. , Cho Hsiao-mei , Clark Susan E. , Cothard Nicholas F. , Crichton Devin , Crowley Kevin T. , Darwish Omar , Datta Rahul , Denison Edward V. , Devlin Mark J. , Duell Cody J. , Duff Shannon M. , Duivenvoorden Adriaan J. , Dunkley Jo , Dünner Rolando , Essinger-Hileman Thomas , Fankhanel Max , Ferraro Simone , Fox Anna E. , Fuzia Brittany , Gallardo Patricio A. , Gluscevic Vera , Golec Joseph E. , Grace Emily , Gralla Megan , Guan Yilun , Hall Kirsten , Halpern Mark , Han Dongwon , Hargrave Peter , Henderson Shawn , Hensley Brandon , Hill J. Colin , Hilton Gene C. , Hilton Matt , Hincks Adam D. , Hložek Renée , Hubmayr Johannes , Huffenberger Kevin M. , Hughes John P. , Infante Leopoldo , Irwin Kent , Jackson Rebecca , Klein Jeff , Knowles Kenda , Kosowsky Arthur , Lakey Vincent , Li Dale , Li Yaqiong , Li Zack , Lokken Martine , Louis Thibaut , MacInnis Amanda , Madhavacheril Mathew , Maldonado Felipe , Mallaby-Kay Maya , Marsden Danica , Maurin Loïc , McMahon Jeff , Menanteau Felipe , Moodley Kavilan , Morton Tim , Naess Sigurd , Namikawa Toshiya , Nati Federico , Newburgh Laura , Nibarger John P. , Nicola Andrina , Niemack Michael D. , Nolta Michael R. , Orlowski-Sherer John , Page Lyman A. , Pappas Christine G. , Partridge Bruce , Phakathi Phumlani , Prince Heather , Puddu Roberto , Qu Frank J. , Rivera Jesus , Robertson Naomi , Rojas Felipe , Salatino Maria , Schaan Emmanuel , Schillaci Alessandro , Schmitt Benjamin L. , Sehgal Neelima , Sherwin Blake D. , Sierra Carlos , Sievers Jon , Sifon Cristobal , Sikhosana Precious , Simon Sara , Spergel David N. , Staggs Suzanne T. , Stevens Jason , Storer Emilie , Sunder Dhaneshwar D. , Switzer Eric R. , Thorne Ben , Thornton Robert , Trac Hy , Treu Jesse , Tucker Carole , Vale Leila R. , Engelen Alexander Van , Lanen Jeff Van , Vavagiakis Eve M. , Wagoner Kasey , Wang Yuhan , Ward Jonathan T. , Wollack Edward J. , Xu Zhilei , Zago Fernando , Zhu Ningfeng 
Published: December 2020

We present the temperature and polarization angular power spectra of the CMB measured by the Atacama Cosmology Telescope (ACT) from 5400 deg2of the 2013–2016 survey, which covers >15000 deg2at 98 and 150 GHz. For this analysis we adopt a blinding strategy to help avoid confirmation bias and, related to this, show numerous checks for systematic error done before unblinding. Using the likelihood for the cosmological analysis we constrain secondary sources of anisotropy and foreground emission, and derive a “CMB-only” spectrum that extends to ℓ=4000. At large angular scales, foreground emission at 150 GHz is ∼1% of TT and EE within our selected regions and consistent with that found byPlanck. Using the same likelihood, we obtain the cosmological parameters for ΛCDM for the ACT data alone with a prior on the optical depth of τ=0.065±0.015. ΛCDM is a good fit. The best-fit model has a reduced χ2of 1.07 (PTE=0.07) withH0=67.9±1.5 km/s/Mpc. We show that the lensing BB signal is consistent with ΛCDM and limit the celestial EB polarization angle to ψP =−0.07̂±0.09̂. We directly cross correlate ACT withPlanckand observe generally good agreement but with some discrepancies in TE. All data on which this analysis is based will be publicly released.