The Atacama Cosmology Telescope: temperature and gravitational lensing power spectrum measurements from three seasons of  data

We present the temperature power spectra of the cosmicmicrowave background (CMB) derived from the three seasons of datafrom 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 cirrusin our equatorial maps. We present the results of a number of testsfor possible systematic error and conclude that any effects are notsignificant compared to the statistical errors we quote. Where theyoverlap, we cross-correlate the ACT and the South Pole Telescope(SPT) maps and show they are consistent. The measurements ofhigher-order peaks in the CMB power spectrum provide an additionaltest of the ΛCDM cosmological model, and help constrain extensionsbeyond the standard model. The small angular scale power spectrumalso provides constraining power on the Sunyaev-Zel'dovich effectsand extragalactic foregrounds. We also present a measurement of theCMB gravitational lensing convergence power spectrum at4.6σ detection significance.

Note:

21 pages; 20 figures, Submitted to JCAP, some typos corrected

CMBR experiments
gravitational lensing
unyaev-Zeldovich effect
CMBR theory

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