The Atacama Cosmology Telescope: calibration with the Wilkinson Microwave Anisotropy Probe using cross-correlations
- Hajian, Amir
- Acquaviva, Viviana
- Ade, Peter A. R.
- Aguirre, Paula
- Amiri, Mandana
- Appel, John William
- Barrientos, L. Felipe
- Battistelli, Elia S.
- Bond, John R.
- Brown, Ben
- Burger, Bryce
- Chervenak, Jay
- Das, Sudeep
- Devlin, Mark J.
- Dicker, Simon R.
- Doriese, W. Bertrand
- Dunkley, Joanna
- Dünner, Rolando
- Essinger-Hileman, Thomas
- Fisher, Ryan P.
- Fowler, Joseph W.
- Halpern, Mark
- Hasselfield, Matthew
- Hernández-Monteagudo, Carlos
- Hilton, Gene C.
- Hilton, Matt
- Hincks, Adam D.
- Hlozek, Renée
- Huffenberger, Kevin M.
- Hughes, David H.
- Hughes, John P.
- Infante, Leopoldo
- Irwin, Kent D.
- Juin, Jean Baptiste
- Kaul, Madhuri
- Klein, Jeff
- Kosowsky, Arthur
- Lau, Judy M.
- Limon, Michele
- Lin, Yen-Ting
- Lupton, Robert H.
- Marriage, Tobias A.
- Marsden, Danica
- Mauskopf, Philip Daniel
- Menanteau, Felipe
- Moodley, Kavilan
- Moseley, Harvey
- Netterfield, Calvin B.
- Niemack, Michael D.
- Nolta, Michael R.
- Page, Lyman A.
- Parker, Lucas
- Partridge, Bruce
- Reid, Beth
- Sehgal, Neelima
- Sherwin, Blake D.
- Sievers, Jon
- Spergel, David N.
- Staggs, Suzanne T.
- Swetz, Daniel S.
- Switzer, Eric R.
- Thornton, Robert
- Trac, Hy
- Tucker, Carole Elizabeth
- Warne, Ryan
- Wollack, Ed
- Zhao, Yue
DOIAbstract
We present a new calibration method based on cross-correlations with the Wilkinson Microwave Anisotropy Probe (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 < l < 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 a high signal-to-noise ratio ...
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