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

Das, Sudeep, Louis, Thibaut, Nolta, Michael R., Addison, Graeme E., Battistelli, Elia S., Bond, J Richard, Calabrese, Erminia, Crichton, Devin, Devlin, Mark J., Dicker, Simon, Dunkley, Joanna, Dünner, Rolando, Fowler, Joseph W., Gralla, Megan, Hajian, Amir, Halpern, Mark, Hasselfield, Matthew, Hilton, Matt, Hincks, Adam D., Hlozek, Renée, Huffenberger, Kevin M., Hughes, John P., Irwin, Kent D., Kosowsky, Arthur, Lupton, Robert H., Marriage, Tobias A., Marsden, Danica, Menanteau, Felipe, Moodley, Kavilan, Niemack, Michael D., Page, Lyman A., Partridge, Bruce, Reese, Erik D., Schmitt, Benjamin L., Sehgal, Neelima, Sherwin, Blake D., Sievers, Jonathan L., Spergel, David N., Staggs, Suzanne T., Swetz, Daniel S., Switzer, Eric R., Thornton, Robert, Trac, Hy and Wollack, Ed 2014. The Atacama Cosmology Telescope: temperature and gravitational lensing power spectrum measurements from three seasons of data. Journal of Cosmology and Astroparticle Physics 2014 (04) , 014. 10.1088/1475-7516/2014/04/014

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Abstract

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.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Physics and Astronomy
Publisher: EDP Sciences
ISSN: 14757516
Date of First Compliant Deposit: 7 September 2017
Date of Acceptance: 19 January 2014
Last Modified: 29 Jun 2019 15:09
URI: http://orca.cf.ac.uk/id/eprint/104444

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