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arXiv · 1009.0777

The Atacama Cosmology Telescope: Calibration with WMAP Using Cross-Correlations

Amir Hajian·Viviana Acquaviva·Peter A. R. Ade·Paula Aguirre·Mandana Amiri·John William Appel·L. Felipe Barrientos·Elia S. Battistelli·J. Richard Bond·Ben Brown·Bryce Burger·Jay Chervenak·Sudeep Das·Mark J. Devlin·Simon R. Dicker·W. Bertrand Doriese·Joanna Dunkley·Rolando Dunner·Thomas Essinger-Hileman·Ryan P. Fisher·Joseph W. Fowler·Mark Halpern·Matthew Hasselfield·Carlos Hernandez-Monteagudo·Gene C. Hilton·Matt Hilton·Adam D. Hincks·Renee Hlozek·Kevin M. Huffenberger·David H. Hughes·John P. Hughes·Leopoldo Infante·Kent D. Irwin·Jean Baptiste Juin·Madhuri Kaul·Jeff Klein·Arthur Kosowsky·Judy M Lau·Michele Limon·Yen-Ting Lin·Robert H. Lupton·Tobias A. Marriage·Danica Marsden·Phil Mauskopf·Felipe Menanteau·Kavilan Moodley·Harvey Moseley·Calvin B. Netterfield·Michael D. Niemack·Michael R. Nolta·Lyman A. Page·Lucas Parker·Bruce Partridge·Beth Reid·Neelima Sehgal·Blake D. Sherwin·Jon Sievers·David N. Spergel·Suzanne T. Staggs·Daniel S. Swetz·Eric R. Switzer·Robert Thornton·Hy Trac·Carole Tucker·Ryan Warne·Ed Wollack·Yue Zhao
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Abstract

We present a new calibration method based on cross-correlations with WMAP and apply it to data from the Atacama Cosmology Telescope (ACT). ACT's observing strategy and map making procedure allows an unbiased reconstruction of the modes in the maps over a wide range of multipoles. By directly matching the ACT maps to WMAP observations in the multipole range of 400 < ell < 1000, we determine the absolute calibration with an uncertainty of 2% in temperature. The precise measurement of the calibration error directly impacts the uncertainties in the cosmological parameters estimated from the ACT power spectra. We also present a combined map based on ACT and WMAP data that has high signal-to-noise over a wide range of multipoles.

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Amir Hajian, Viviana Acquaviva, Peter A. R. Ade, Paula Aguirre, Mandana Amiri, John William Appel, L. Felipe Barrientos, Elia S. Battistelli, J. Richard Bond, Ben Brown, Bryce Burger, Jay Chervenak, Sudeep Das, Mark J. Devlin, Simon R. Dicker, W. Bertrand Doriese, Joanna Dunkley, Rolando Dunner, Thomas Essinger-Hileman, Ryan P. Fisher, Joseph W. Fowler, Mark Halpern, Matthew Hasselfield, Carlos Hernandez-Monteagudo, Gene C. Hilton, Matt Hilton, Adam D. Hincks, Renee Hlozek, Kevin M. Huffenberger, David H. Hughes, John P. Hughes, Leopoldo Infante, Kent D. Irwin, Jean Baptiste Juin, Madhuri Kaul, Jeff Klein, Arthur Kosowsky, Judy M Lau, Michele Limon, Yen-Ting Lin, Robert H. Lupton, Tobias A. Marriage, Danica Marsden, Phil Mauskopf, Felipe Menanteau, Kavilan Moodley, Harvey Moseley, Calvin B. Netterfield, Michael D. Niemack, Michael R. Nolta, Lyman A. Page, Lucas Parker, Bruce Partridge, Beth Reid, Neelima Sehgal, Blake D. Sherwin, Jon Sievers, David N. Spergel, Suzanne T. Staggs, Daniel S. Swetz, Eric R. Switzer, Robert Thornton, Hy Trac, Carole Tucker, Ryan Warne, Ed Wollack, Yue Zhao. 2010-09-03. The Atacama Cosmology Telescope: Calibration with WMAP Using Cross-Correlations. https://doi.org/10.1088/0004-637x/740/2/86

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