Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Planets and Celestial Calibration Sources
Janet L. Weiland,N. Odegard,Robert S. Hill,Edward J. Wollack,Gary Hinshaw,M. R. Greason,N. Jarosik,Lyman A. Page,Charles L. Bennett,Joanna Dunkley,B. Gold,Mark Halpern,Alan J. Kogut,Eiichiro Komatsu,David Larson,Michele Limon,S. S. Meyer,Michael R. Nolta,Kristine M. Smith,David N. Spergel,Gregory S. Tucker,Edward L. Wright +21 more
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In this article, seven-year observations of bright sources which are often used as calibrators at microwave frequencies were studied in five frequency bands (23 - 94 GHz): the outer planets (Mars, Jupiter, Saturn, Uranus and Neptune) and five fixed celestial sources (Cas A, Tau A, Cyg A, 3C274 and 3C58).Abstract:
(Abridged) We present WMAP seven-year observations of bright sources which are often used as calibrators at microwave frequencies. Ten objects are studied in five frequency bands (23 - 94 GHz): the outer planets (Mars, Jupiter, Saturn, Uranus and Neptune) and five fixed celestial sources (Cas A, Tau A, Cyg A, 3C274 and 3C58). The seven-year analysis of Jupiter provides temperatures which are within 1-sigma of the previously published WMAP five-year values, with slightly tighter constraints on variability with orbital phase, and limits (but no detections) on linear polarization. Scaling factors are provided which, when multiplied by the Wright Mars thermal model predictions at 350 micron, reproduce WMAP seasonally averaged observations of Mars within ~2%. An empirical model is described which fits brightness variations of Saturn due to geometrical effects and can be used to predict the WMAP observations to within 3%. Seven-year mean temperatures for Uranus and Neptune are also tabulated. Uncertainties in Uranus temperatures are 3%-4% in the 41, 61 and 94 GHz bands; the smallest uncertainty for Neptune is ~8% for the 94 GHz band. Intriguingly, the spectrum of Uranus appears to show a dip at ~30 GHz of unidentified origin, although the feature is not of high statistical significance. Flux densities for the five selected fixed celestial sources are derived from the seven-year WMAP sky maps, and are tabulated for Stokes I, Q and U, along with polarization fraction and position angle. Fractional uncertainties for the Stokes I fluxes are typically 1% to 3%. Source variability over the seven-year baseline is also estimated. Significant secular decrease is seen for Cas A and Tau A: our results are consistent with a frequency independent decrease of about 0.53% per year for Cas A and 0.22% per year for Tau A.read more
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Proceedings ArticleDOI
ACTPol: a polarization-sensitive receiver for the Atacama Cosmology Telescope.
Michael D. Niemack,Peter A. R. Ade,James E. Aguirre,Felipe Barrientos,James A. Beall,John Bond,Joseph W. Britton,Hsiao-Mei Cho,Sudeep Das,Mark J. Devlin,Simon Dicker,Joanna Dunkley,Rolando Dünner,Joseph W. Fowler,Amir Hajian,Mark Halpern,Matthew Hasselfield,Gene C. Hilton,Matt Hilton,Johannes Hubmayr,John P. Hughes,Leopoldo Infante,Kent D. Irwin,N. Jarosik,Jeff Klein,Arthur Kosowsky,Tobias A. Marriage,Jeff McMahon,Felipe Menanteau,Kavilan Moodley,John P. Nibarger,Michael R. Nolta,Lyman A. Page,B. Partridge,Erik D. Reese,Jonathan Sievers,David N. Spergel,Suzanne T. Staggs,Robert Thornton,Carole Tucker,Edward J. Wollack,Ki Won Yoon +41 more
TL;DR: The Atacama Cosmology Telescope (ACT) in Chile was built to measure the cosmic microwave background (CMB) at arcminute angular scales as discussed by the authors, and a new polarization sensitive receiver for ACT was proposed to characterize the gravitational lensing of the CMB and constrain the sum of the neutrino masses with ~ 0.05 eV precision.
Journal ArticleDOI
The Atacama Cosmology Telescope: A Measurement of the Cosmic Microwave Background Power Spectrum at 148 and 218 GHz from the 2008 Southern Survey
Sudeep Das,Tobias A. Marriage,Peter A. R. Ade,Paula Aguirre,Mandana Amir,John W. Appel,L. Felipe Barrientos,Elia S. Battistelli,J. Richard Bond,Ben Brown,B. Burger,Jay Chervenak,Mark J. Devlin,Simon Dicker,W. Bertrand Doriese,Joanna Dunkley,Rolando Dünner,Thomas Essinger-Hileman,R. P. Fisher,Joseph W. Fowler,Amir Hajian,Mark Halpern,Matthew Hasselfield,Carlos Hernández-Monteagudo,Gene C. Hilton,Matt Hilton,Adam D. Hincks,Renée Hlozek,Kevin M. Huffenberger,David H. Hughes,John P. Hughes,Leopoldo Infante,Kent D. Irwin,Jean Baptiste Juin,Madhuri Kaul,Jacob Klein,Arthur Kosowsky,Judy M. Lau,Michele Limon,Yen-Ting Lin,Robert H. Lupton,Danica Marsden,Krista Martocci,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,Edward J. Wollack,Yue Zhao +66 more
TL;DR: In this paper, the second through the seventh acoustic peaks in the CMB power spectrum were measured by the Atacama Cosmology Telescope at 148 GHz and 218 GHz, as well as the crossfrequency spectrum between the two channels.
Journal ArticleDOI
The Atacama Cosmology Telescope: CMB Polarization at $200<\ell<9000$
Sigurd Naess,Matthew Hasselfield,Jeff McMahon,Michael D. Niemack,Graeme E. Addison,Peter A. R. Ade,R. Allison,Mandana Amiri,Nick Battaglia,James A. Beall,Francesco De Bernardis,J. Richard Bond,Joseph W. Britton,Erminia Calabrese,Hsiao-Mei Cho,Kevin Coughlin,Devin Crichton,Sudeep Das,Rahul Datta,Mark J. Devlin,Simon Dicker,Joanna Dunkley,Rolando Dünner,Joseph W. Fowler,Anna E. Fox,Patricio A. Gallardo,Emily Grace,Megan Gralla,Amir Hajian,Mark Halpern,Shawn W. Henderson,J. Colin Hill,Gene C. Hilton,Matt Hilton,Adam D. Hincks,Renée Hlozek,Patty Ho,Johannes Hubmayr,Kevin M. Huffenberger,John P. Hughes,Leopoldo Infante,Kent D. Irwin,Rebecca Jackson,Simon Muya Kasanda,Jacob Klein,Brian J. Koopman,Arthur Kosowsky,Dale Li,Thibaut Louis,M. Lungu,Mathew S. Madhavacheril,Tobias A. Marriage,Loïc Maurin,Felipe Menanteau,Kavilan Moodley,Charles Munson,Laura Newburgh,John P. Nibarger,Michael R. Nolta,Lyman A. Page,Christine G. Pappas,Bruce Partridge,Felipe Rojas,Benjamin L. Schmitt,Neelima Sehgal,Blake D. Sherwin,Jon Sievers,Sara M. Simon,David N. Spergel,Suzanne T. Staggs,Eric R. Switzer,Robert Thornton,Hy Trac,Carole Tucker,Masao Uehara,Alexander van Engelen,Jon Ward,Edward J. Wollack +77 more
TL;DR: In this paper, the Atacama Cosmology Telescope Polarimeter (ACTPol) was used for measurements of the cosmic microwave background (CMB) and celestial polarization at 146 GHz made with the ACTPol in its first three months of observing.
Journal ArticleDOI
The Atacama Cosmology Telescope: A Measurement of the 600< ell <8000 Cosmic Microwave Background Power Spectrum at 148 GHz
Joseph W. Fowler,Viviana Acquaviva,P. A. R. Ade,Paula Aguirre,M. Amiri,J. W. Appel,L. F. Barrientos,Elia S. Battistelli,J. R. Bond,Ben Brown,B. Burger,Jay Chervenak,Sudeep Das,M. J. Devlin,Simon Dicker,William B. Doriese,Jo Dunkley,R. Dunner,Thomas Essinger-Hileman,Rebecca Fisher,Amir Hajian,Mark Halpern,M. Hasselfield,C. Hernández-Monteagudo,Gene C. Hilton,Matt Hilton,Adam D. Hincks,Renée Hlozek,Kevin M. Huffenberger,David H. Hughes,John P. Hughes,L. Infante,Kent D. Irwin,Ralph Jimenez,J. B. Juin,Madhuri Kaul,Jacob Klein,A. Kosowsky,Judy M. Lau,Michele Limon,Yen-Ting Lin,Robert H. Lupton,Tobias A. Marriage,Danica Marsden,Krista Martocci,Phil Mauskopf,Felipe Menanteau,K. Moodley,H. Moseley,Calvin B. Netterfield,Michael D. Niemack,M. R. Nolta,Lyman A. Page,L. P. Parker,B. Partridge,Hernan Quintana,B. Reid,Neelima Sehgal,J. Sievers,David N. Spergel,S. T. Staggs,Daniel S. Swetz,Eric R. Switzer,Robert Thornton,Hy Trac,Carole Tucker,Licia Verde,Ryan Warne,G. W. Wilson,Edward J. Wollack,Yue Zhao +70 more
TL;DR: In this paper, the angular power spectrum of the cosmic microwave background (CMB) was measured at 148 GHz using maps with 1.4' angular resolution made with data from the Atacama Cosmology Telescope (ACT).
Journal ArticleDOI
The Atacama Cosmology Telescope: Physical Properties and Purity of a Galaxy Cluster Sample Selected via the Sunyaev-Zel'dovich Effect
Felipe Menanteau,Jorge González,J. B. Juin,Tobias A. Marriage,Erik D. Reese,Viviana Acquaviva,Paula Aguirre,John W. Appel,Andrew J. Baker,L. Felipe Barrientos,Elia S. Battistelli,J. Richard Bond,Sudeep Das,Mark J. Devlin,Simon Dicker,Amruta J. Deshpande,Joanna Dunkley,Rolando Dünner,Thomas Essinger-Hileman,Joseph W. Fowler,Amir Hajian,Mark Halpern,Matthew Hasselfield,Carlos Hernández-Monteagudo,Matt Hilton,Adam D. Hincks,Renée Hlozek,John P. Hughes,Kevin M. Huffenberger,Leopoldo Infante,Kent D. Irwin,Jacob Klein,Arthur Kosowsky,Yen-Ting Lin,Danica Marsden,Kavilan Moodley,Michael D. Niemack,Michael R. Nolta,Lyman A. Page,Lucas Parker,Bruce Partridge,Jon Sievers,Neelima Sehgal,David N. Spergel,Suzanne T. Staggs,Daniel S. Swetz,Eric R. Switzer,Robert Thornton,Hy Trac,Ryan Warne,Edward J. Wollack +50 more
TL;DR: In this paper, the authors presented optical and X-ray properties for the first confirmed galaxy cluster sample selected by the Sunyaev-Zel'dovich Effect from 148 GHz maps over 455 square degrees of sky made with the Atacama Cosmology Telescope.
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