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The Atacama Cosmology Telescope: cross correlation with Planck maps

Louis, Thibaut, Addison, Graeme E., Hasselfield, Matthew, Bond, J. Richard, Calabrese, Erminia ORCID:, Das, Sudeep, Devlin, Mark J., Dunkley, Joanna, Dünner, Rolando, Gralla, Megan, Hajian, Amir, Hincks, Adam D., Hlozek, Renée, Huffenberger, Kevin, Infante, Leopoldo, Kosowsky, Arthur, Marriage, Tobias A., Moodley, Kavilan, Næss, Sigurd, Niemack, Michael D., Nolta, Michael R., Page, Lyman A., Partridge, Bruce, Sehgal, Neelima, Sievers, Jonathan L., Spergel, David N., Staggs, Suzanne T., Walter, Benjamin Z. and Wollack, Edward J. 2014. The Atacama Cosmology Telescope: cross correlation with Planck maps. Journal of Cosmology and Astroparticle Physics 2014 (07) , 016. 10.1088/1475-7516/2014/07/016

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We present the temperature power spectrum of the Cosmic Microwave Background obtained by cross-correlating maps from the Atacama Cosmology Telescope (ACT) at 148 and 218 GHz with maps from the Planck satellite at 143 and 217 GHz, in two overlapping regions covering 592 square degrees. We find excellent agreement between the two datasets at both frequencies, quantified using the variance of the residuals between the ACT power spectra and the ACT × Planck cross-spectra. We use these cross-correlations to measure the calibration of the ACT data at 148 and 218 GHz relative to Planck, to 0.7% and 2% precision respectively. We find no evidence for anisotropy in the calibration parameter. We compare the Planck 353 GHz power spectrum with the measured amplitudes of dust and cosmic infrared background (CIB) of ACT data at 148 and 218 GHz. We also compare planet and point source measurements from the two experiments.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: IOP Publishing
ISSN: 14757516
Date of First Compliant Deposit: 7 September 2017
Date of Acceptance: 11 June 2014
Last Modified: 17 Nov 2023 05:03

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