The atacama cosmology telescope: Temperature and gravitational lensing power spectrum measurements from three seasons of data

Sudeep Das, Thibaut Louis, Michael R. Nolta, Graeme E. Addison, Elia S. Battistelli, J. Richard Bond, Erminia Calabrese, Devin Crichton, Mark J. Devlin, Simon Dicker, Joanna Dunkley, Rolando Dünner, Joseph W. Fowler, Megan Gralla, Amir Hajian, Mark Halpern, Matthew Hasselfield, Matt Hilton, Adam D. Hincks, Renée HlozekKevin M. Huffenberger, John P. Hughes, Kent D. Irwin, Arthur Kosowsky, Robert H. Lupton, Tobias A. Marriage, Danica Marsden, Felipe Menanteau, Kavilan Moodley, Michael D. Niemack, Lyman A. Page, Bruce Partridge, Erik D. Reese, Benjamin L. Schmitt, Neelima Sehgal, Blake D. Sherwin, Jonathan L. Sievers, David N. Spergel, Suzanne T. Staggs, Daniel S. Swetz, Eric R. Switzer, Robert Thornton, Hy Trac, Ed Wollack

Research output: Contribution to journalArticlepeer-review

200 Scopus citations


We present the temperature power spectra of the cosmic microwave background (CMB) derived from the three seasons of data from the Atacama Cosmology Telescope (ACT) at 148 GHz and 218 GHz, as well as the cross-frequency spectrum between the two channels. We detect and correct for contamination due to the Galactic cirrus in our equatorial maps. We present the results of a number of tests for possible systematic error and conclude that any effects are not significant compared to the statistical errors we quote. Where they overlap, we cross-correlate the ACT and the South Pole Telescope (SPT) maps and show they are consistent. The measurements of higher-order peaks in the CMB power spectrum provide an additional test of the ΛCDM cosmological model, and help constrain extensions beyond the standard model. The small angular scale power spectrum also provides constraining power on the Sunyaev-Zel'dovich effects and extragalactic foregrounds. We also present a measurement of the CMB gravitational lensing convergence power spectrum at 4.6σ detection significance.

Original languageEnglish (US)
Article number014
JournalJournal of Cosmology and Astroparticle Physics
Issue number4
StatePublished - Apr 2014

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics


  • CMBR experiments
  • CMBR theory
  • Sunyaev-Zeldovich effect
  • gravitational lensing


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