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Cosmic Microwave Background Anisotropy Measurement from Python V

Coble, K. and Dodelson, S. and Dragovan, M. and Ganga, K. and Knox, L. and Kovac, J. and Ratra, B. and Souradeep, T. (2003) Cosmic Microwave Background Anisotropy Measurement from Python V. Astrophysical Journal, 584 (2). ISSN 0004-637X. doi:10.1086/345714.

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We analyze observations of the microwave sky made with the Python experiment in its fifth year of operation at the Amundsen-Scott South Pole Station in Antarctica. After modeling the noise and constructing a map, we extract the cosmic signal from the data. We simultaneously estimate the angular power spectrum in eight bands ranging from large (ℓ ~ 40) to small (ℓ ~ 260) angular scales, with power detected in the first six bands. There is a significant rise in the power spectrum from large to smaller (ℓ ~ 200) scales, consistent with that expected from acoustic oscillations in the early universe. We compare this Python V map to a map made from data taken in the third year of Python. Python III observations were made at a frequency of 90 GHz and covered a subset of the region of the sky covered by Python V observations, which were made at 40 GHz. Good agreement is obtained both visually (with a filtered version of the map) and via a likelihood ratio test.

Item Type:Article
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Additional Information:© 2003. The American Astronomical Society. Received 2001 December 20; accepted 2002 October 22. This work was supported by the James S. McDonnell Foundation, PYI grant NSF AST 90-57089, and the NSF under a cooperative agreement with the Center for Astrophysical Research in Antarctica (CARA), grant NSF OPP 89-20223. CARA is an NSF Science and Technology Center. K. C. is supported by NSF grant AST 01-04465. The work of S. D. was supported by the DOE and by NASA grant NAG 5-10842 at Fermilab and by NSF grant PHY-0079251 at Chicago. B. R. and T. S. acknowledge support from NSF CAREER grant AST 98-75031.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
James S. McDonnell FoundationUNSPECIFIED
NSFAST 90-57089
Center for Astrophysics Research in Antartica (CARA)UNSPECIFIED
NSFOPP 89-20223
NSFAST 01-04465
Department of Energy (DOE)UNSPECIFIED
NASANAG 5-10842
NSFAST 98-75031
Subject Keywords:cosmic microwave background; cosmology: observations
Issue or Number:2
Record Number:CaltechAUTHORS:20170408-144740114
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Official Citation:K. Coble et al 2003 ApJ 584 585
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76009
Deposited By: 1Science Import
Deposited On:04 May 2017 21:17
Last Modified:15 Nov 2021 16:56

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