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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 mapmaking 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 over a wide range of multipoles.

The Atacama Cosmology Telescope: Calibration with WMAP Using Cross-Correlations / Hajian, Amir; Acquaviva, Viviana; Ade Peter, A. R.; Aguirre, Paula; Amiri, Mandana; Appel John, William; Barrientos L., Felipe; BATTISTELLI, Elia Stefano; Bond J., Richard; Brown, Ben; Burger, Bryce; Chervenak, Jay; Das, Sudeep; Devlin Mark, J.; Dicker Simon, R.; Bertrand Doriese, W.; Dunkley, Joanna; Dunner, Rolando; Essinger Hileman, Thomas; Fisher Ryan, P.; Fowler Joseph, W.; Halpern, Mark; Hasselfield, Matthew; Hernandez Monteagudo, Carlos; Hilton Gene, C.; Hilton, Matt; Hincks Adam, D.; Hlozek, Renee; Huffenberger Kevin, M.; Hughes David, H.; Hughes John, P.; Infante, Leopoldo; Irwin Kent, D.; Baptiste Juin, Jean; Kaul, Madhuri; Klein, Jeff; Kosowsky, Arthur; Lau Judy, M; Limon, Michele; Lin Yen, Ting; Lupton Robert, H.; Marriage Tobias, A.; Marsden, Danica; Mauskopf, Phil; 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; Warne, Ryan; Wollack, Ed; Zhao, Yue. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - (2011). [10.1088/0004-637X/740/2/86]

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

BATTISTELLI, Elia Stefano;
2011

Abstract

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 mapmaking 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 over a wide range of multipoles.
2011
cosmic background radiation – cosmology: observations – methods: data analysis – methods: statistical
01 Pubblicazione su rivista::01a Articolo in rivista
The Atacama Cosmology Telescope: Calibration with WMAP Using Cross-Correlations / Hajian, Amir; Acquaviva, Viviana; Ade Peter, A. R.; Aguirre, Paula; Amiri, Mandana; Appel John, William; Barrientos L., Felipe; BATTISTELLI, Elia Stefano; Bond J., Richard; Brown, Ben; Burger, Bryce; Chervenak, Jay; Das, Sudeep; Devlin Mark, J.; Dicker Simon, R.; Bertrand Doriese, W.; Dunkley, Joanna; Dunner, Rolando; Essinger Hileman, Thomas; Fisher Ryan, P.; Fowler Joseph, W.; Halpern, Mark; Hasselfield, Matthew; Hernandez Monteagudo, Carlos; Hilton Gene, C.; Hilton, Matt; Hincks Adam, D.; Hlozek, Renee; Huffenberger Kevin, M.; Hughes David, H.; Hughes John, P.; Infante, Leopoldo; Irwin Kent, D.; Baptiste Juin, Jean; Kaul, Madhuri; Klein, Jeff; Kosowsky, Arthur; Lau Judy, M; Limon, Michele; Lin Yen, Ting; Lupton Robert, H.; Marriage Tobias, A.; Marsden, Danica; Mauskopf, Phil; 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; Warne, Ryan; Wollack, Ed; Zhao, Yue. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - (2011). [10.1088/0004-637X/740/2/86]
01a Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/388910
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