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Measurements of the anisotropy of the cosmic background radiation at 0.5 deg scale near the star Mu PegasiResults are presented from the third flight of the MAX experiment, an attitude-controlled balloon-borne millimeter-wave telescope with a 0.5 deg beam, a 1 deg chop, and a three-channel bolometric photometer. Several hours of high-quality data were obtained during a flight on 1991 June 5, including long integrations to search for CBR anisotropy, two separate measurements of dust in the Galactic plane, a brief scan of the Coma Cluster to search for the Sunyaev-Zel'dovich (SZ) effect, and a number of important systematic tests. Data from one of the long CBR integrations, carried out in a region of sky near the star Mu Pegasi, are presented. The primary structure in the data is shown to be emission from Galactic dust via its spectrum and correlation with the IRAS 100/micron map. Several approaches are used to fit this dust component and remove it from the data. An upper limit to CBR anisotropy of deltaT/T less than 2.5 x 10 exp -5 is obtained for a Gaussian autocorrelation function with coherence angle omega(c) = 25'. This limit is significantly higher than the measurement sensitivity of deltaT/T about 1 x 10 exp -5 due to the presence of residual structure in the data after removal of the dust component.
Document ID
19930053815
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Meinhold, P.
(California Univ. Santa Barbara, United States)
Clapp, A.
(NASA Headquarters Washington, DC United States)
Devlin, M.
(NASA Headquarters Washington, DC United States)
Fischer, M.
(California Univ. Berkeley, United States)
Gundersen, J.
(California Univ. Santa Barbara, United States)
Holmes, W.
(NASA Headquarters Washington, DC United States)
Lange, A.
(California Univ. Berkeley, United States)
Lubin, P.
(California Univ. Santa Barbara, United States)
Richards, P.
(California Univ. Berkeley, United States)
Smoot, G.
(Lawrence Berkeley Lab. Berkeley, CA, United States)
Date Acquired
August 16, 2013
Publication Date
May 20, 1993
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 409
Issue: 1
ISSN: 0004-637X
Subject Category
Space Radiation
Accession Number
93A37812
Funding Number(s)
CONTRACT_GRANT: NAGW-1062
CONTRACT_GRANT: NSF AST-91-20005
CONTRACT_GRANT: NAGW-2121
Distribution Limits
Public
Copyright
Other

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