The Atacama Cosmology Telescope: Cross correlation with Planck maps

Thibaut Louis, Graeme E. Addison, Matthew Hasselfield, J. Richard Bond, Erminia Calabrese, Sudeep Das, Mark J. Devlin, Joanna Dunkley, Rolando Dünner, Megan Gralla, Amir Hajian, Adam D. Hincks, Renée Hlozek, Kevin Huffenberger, Leopoldo Infante, Arthur Kosowsky, Tobias A. Marriage, Kavilan Moodley, Sigurd Næss, Michael D. NiemackMichael R. Nolta, Lyman A. Page, Bruce Partridge, Neelima Sehgal, Jonathan L. Sievers, David N. Spergel, Suzanne T. Staggs, Benjamin Z. Walter, Edward J. Wollack

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


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.

Original languageEnglish (US)
Article number016
JournalJournal of Cosmology and Astroparticle Physics
Issue number7
StatePublished - Jul 1 2014

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics


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