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 ACTxPlanck cross-spectra. We use these cross-correlations to calibrate the ACT data at 148 and 218 GHz, 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.
@article{arxiv.1403.0608,
title = {The Atacama Cosmology Telescope: Cross Correlation with Planck maps},
author = {Thibaut Louis and Graeme E. Addison and Matthew Hasselfield and J Richard Bond and Erminia Calabrese and Sudeep Das and Mark J. Devlin and Joanna Dunkley and Rolando Dünner and Megan Gralla and Amir Hajian and Adam D. Hincks and Renée Hlozek and Kevin Huffenberger and Leopoldo Infante and Arthur Kosowsky and Tobias A. Marriage and Kavilan Moodley and Sigurd Næss and Michael D. Niemack and Michael R. Nolta and Lyman A. Page and Bruce Partridge and Neelima Sehgal and Jonathan L. Sievers and David N. Spergel and Suzanne T. Staggs and Benjamin Z. Walter and Edward J. Wollack},
journal= {arXiv preprint arXiv:1403.0608},
year = {2015}
}