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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The Atacama cosmology telescope: Data characterization and mapmaking
Astrophysical Journal, Volume 762, No. 1, Article 10, Year 2013
Notification
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Description
We present a description of the data reduction and mapmaking pipeline used for the 2008 observing season of the Atacama Cosmology Telescope (ACT). The data presented here at 148 GHz represent 12% of the 90 TB collected by ACT from 2007 to 2010. In 2008 we observed for 136 days, producing a total of 1423 hr of data (11 TB for the 148 GHz band only), with a daily average of 10.5 hr of observation. From these, 1085 hr were devoted to an 850 deg2 stripe (11.2 hr by 9.°1) centered on a declination of -52.°7, while 175 hr were devoted to a 280 deg2 stripe (4.5 hr by 4.°8) centered at the celestial equator. The remaining 163 hr correspond to calibration runs. We discuss sources of statistical and systematic noise, calibration, telescope pointing, and data selection. For the 148 GHz band, out of 1260 survey hours and 1024 detectors in the array, 816 hr and 593 effective detectors remain after data selection, yielding a 38% survey efficiency. The total sensitivity in 2008, determined from the noise level between 5 Hz and 20 Hz in the time-ordered data stream (TOD), is in cosmic microwave background units. Atmospheric brightness fluctuations constitute the main contaminant in the data and dominate the detector noise covariance at low frequencies in the TOD. The maps were made by solving the least-squares problem using the Preconditioned Conjugate Gradient method, incorporating the details of the detector and noise correlations. Simulations, as well as cross-correlations with Wilkinson Microwave Anisotropy Probe sky maps on large angular scales, reveal that our maps are unbiased at multipoles ℓ > 300. This paper accompanies the public release of the 148 GHz southern stripe maps from 2008. The techniques described here will be applied to future maps and data releases. © 2013. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Dünner, Rolando
Chile, Santiago
Pontificia Universidad Católica de Chile
Hasselfield, Matthew F.
Canada, Vancouver
The University of British Columbia
Marriage, Tobias A.
United States, Princeton
Princeton University
United States, Baltimore
Johns Hopkins University
Sievers, Jonathan L.
United States, Princeton
Princeton University
Canada, Toronto
L’institut Canadien D’astrophysique Théorique
Acquaviva, Viviana
United States, Princeton
Princeton University
United States, New Brunswick
Rutgers University–new Brunswick
Addison, Graeme E.
United Kingdom, Oxford
University of Oxford
Ade, Peter A.R.
United Kingdom, Cardiff
Cardiff University
Aguirre, Paula
Chile, Santiago
Pontificia Universidad Católica de Chile
Amiri, Mandana
Canada, Vancouver
The University of British Columbia
Appel, John William
United States, Princeton
Princeton University
Barrientos, F. Felipe
Chile, Santiago
Pontificia Universidad Católica de Chile
Battistelli, Elia Stefano
Canada, Vancouver
The University of British Columbia
Italy, Rome
Sapienza Università Di Roma
Bond, J. Richard
Canada, Toronto
L’institut Canadien D’astrophysique Théorique
Brown, Ben R.
United States, Pittsburgh
University of Pittsburgh
Burger, Bryce
Canada, Vancouver
The University of British Columbia
Calabrese, Erminia
United Kingdom, Oxford
University of Oxford
Chervenak, James A.
United States, Greenbelt
Nasa Goddard Space Flight Center
Das, Sudeep
United States, Princeton
Princeton University
United States, Berkeley
University of California, Berkeley
Devlin, Mark J.
United States, Philadelphia
University of Pennsylvania
Dicker, Simon R.
United States, Philadelphia
University of Pennsylvania
Doriese, W. Bertrand
United States, Gaithersburg
National Institute of Standards and Technology
Dunkley, Joanna
United States, Princeton
Princeton University
United Kingdom, Oxford
University of Oxford
Essinger-Hileman, Thomas M.
United States, Princeton
Princeton University
Fisher, Ryan P.
United States, Princeton
Princeton University
Gralla, Megan B.
United States, Baltimore
Johns Hopkins University
Fowler, Joseph W.
United States, Princeton
Princeton University
United States, Gaithersburg
National Institute of Standards and Technology
Hajian, Amir
United States, Princeton
Princeton University
Canada, Toronto
University of Toronto
Halpern, Mark
Canada, Vancouver
The University of British Columbia
Hërnàndez-Monteagudo, Carlos
Germany, Garching Bei Munchen
Max Planck Institute for Astrophysics
Hilton, Gene C.
United States, Gaithersburg
National Institute of Standards and Technology
Hilton, Matt
South Africa, Durban
University of Kwazulu-natal
United Kingdom, Nottingham
University of Nottingham
Hincks, Adam D.
United States, Princeton
Princeton University
Canada, Toronto
L’institut Canadien D’astrophysique Théorique
Hložek, Renée A.
United States, Princeton
Princeton University
United Kingdom, Oxford
University of Oxford
Huffenberger, Kevin M.
United States, Coral Gables
University of Miami
Hughes, David H.
Mexico, Puebla
Instituto Nacional de Astrofisica Optica y Electronica
Hughes, John P.
United States, New Brunswick
Rutgers University–new Brunswick
Infante, Leopoldo
Chile, Santiago
Pontificia Universidad Católica de Chile
Irwin, Kent D.
United States, Gaithersburg
National Institute of Standards and Technology
Juin, Jean Baptiste
Chile, Santiago
Pontificia Universidad Católica de Chile
Kaul, Madhuri
United States, Philadelphia
University of Pennsylvania
Klein, Jeffrey
United States, Philadelphia
University of Pennsylvania
Kosowsky, Arthur B.
United States, Pittsburgh
University of Pittsburgh
Lau, Judy M.
United States, Princeton
Princeton University
Limon, Michele
United States, Princeton
Princeton University
United States, Philadelphia
University of Pennsylvania
United States, New York
Columbia University
Lin, Yen Ting
Chile, Santiago
Pontificia Universidad Católica de Chile
United States, Princeton
Princeton University
Japan, Tokyo
The University of Tokyo
Taiwan, Taipei
Academia Sinica, Institute of Astronomy and Astrophysics
Louis, Thibaut
United Kingdom, Oxford
University of Oxford
Lupton, Robert H.
United States, Princeton
Princeton University
Marsden, Danica W.
United States, Santa Barbara
University of California, Santa Barbara
Martocci, Krista L.
United States, Princeton
Princeton University
United States, Chicago
The Kavli Institute for Cosmological Physics
Mauskopf, Phillip D.
United Kingdom, Cardiff
Cardiff University
Menanteau, Felipe
United States, New Brunswick
Rutgers University–new Brunswick
Moodley, Kavilan
South Africa, Durban
University of Kwazulu-natal
South Africa, Cape Town
Centre for High Performance Computing, Cape Town
Moseley, Harvey S.
United States, Greenbelt
Nasa Goddard Space Flight Center
Netterfield, C. Barth
Canada, Toronto
University of Toronto
Niemack, Michael D.
United States, Princeton
Princeton University
United States, Gaithersburg
National Institute of Standards and Technology
Nolta, Michael R.
Canada, Toronto
L’institut Canadien D’astrophysique Théorique
Page, Lyman A.
United States, Princeton
Princeton University
Parker, Lucas P.
United States, Princeton
Princeton University
Partridge, Bruce
United States, Haverford
Haverford College
Quintana, Hernán
Chile, Santiago
Pontificia Universidad Católica de Chile
Reid, Beth Ann
United States, Princeton
Princeton University
United States, Berkeley
University of California, Berkeley
Sehgal, Neelima
United States, Princeton
Princeton University
Sherwin, Blake D.
United States, Princeton
Princeton University
Spergel, David N.
United States, Princeton
Princeton University
Staggs, Suzanne T.
United States, Princeton
Princeton University
Swetz, Daniel S.
United States, Philadelphia
University of Pennsylvania
United States, Gaithersburg
National Institute of Standards and Technology
Switzer, Eric R.
United States, Princeton
Princeton University
Canada, Toronto
L’institut Canadien D’astrophysique Théorique
Thornton, Robert J.
United States, Philadelphia
University of Pennsylvania
United States, West Chester
West Chester University
Trac, H. Y.
United States, Princeton
Princeton University
United States, Cambridge
Harvard University
Tucker, Carole E.
United Kingdom, Cardiff
Cardiff University
Warne, Ryan
South Africa, Durban
University of Kwazulu-natal
Wilson, Grant W.
United States, Amherst
University of Massachusetts Amherst
Wollack, Edward J.
United States, Greenbelt
Nasa Goddard Space Flight Center
Zhao, Yue
United States, Princeton
Princeton University
Statistics
Citations: 79
Authors: 74
Affiliations: 30
Identifiers
Doi:
10.1088/0004-637X/762/1/10
ISSN:
0004637X
e-ISSN:
15384357
Research Areas
Infectious Diseases
Study Design
Cross Sectional Study
Study Approach
Quantitative