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measurements of anisotropy in the cosmic microwave background radiation at degree angular scales near the stars sigma herculis and iota draconisWe present results from two four-frequency observations centered near the stars Sigma Herculis and Iota Draconis during the fourth flight of the Millimeter-wave Anisotropy eXperiment (MAX). The observations were made of 6 deg x 0.6 deg strips of the sky with a 1.4 deg peak to peak sinusoidal chop in all bands. The full width at half maximum (FWHM) beam sizes were calculated 0.55 deg +/- 0.05 deg at 3.5/cm and a 0.75 deg +/- 0.05 deg at 6, 9, and 14/cm. Significant correlated structures were observed at 3.5, 6, and 9/cm. The spectra of these signals are inconsistent with thermal emission from known interstellar dust populations. The extrapolated amplitudes of synchrotron and free-free emission are too small to account for the amplitude of the observed structures. If the observed structures are attributed to cosmic microwave background (CMB) anisotropy with a Gaussian autocorrelation function and a coherence angle of 25 min, then the most probable values at Delta T/T(sub CMB) = 3.1 (sup +1.7 sub -1.3) x 10(exp -5) for the Sigma Herculis scan, and Delta T/T(sub CMB) = 3.3(sup +1.1 sub -1.1) x 10(exp -5) for the Iota Draconis scan (95% confidence upper, lower limits).
Document ID
19950040666
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Clapp, A. C.
(University of California at Berkeley, Berkeley, CA United States)
Devlin, M. J.
(University of California at Berkeley, Berkeley, CA United States)
Gundersen, J. O.
(University of California at Santa Barbara, Santa Barbara, CA United States)
Hagmann, C. A.
(University of California at Berkeley, Berkeley, CA United States)
Hristov, V. V.
(University of California at Berkeley, Berkeley, CA United States)
Lange, A. E.
(University of California at Berkeley, Berkeley, CA United States)
Lim, M.
(University of California at Santa Barbara, Santa Barbara, CA United States)
Lubin, P. M.
(University of California at Santa Barbara, Santa Barbara, CA United States)
Mauskopf, P. D.
(University of California at Berkeley, Berkeley, CA United States)
Meinhold, P. R.
(University of California at Santa Barbara, Santa Barbara, CA United States)
Date Acquired
August 16, 2013
Publication Date
October 1, 1994
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 433
Issue: 2
ISSN: 0004-637X
Subject Category
ASTRONOMY
Funding Number(s)
CONTRACT_GRANT: NSF AST-91-20005
CONTRACT_GRANT: NAGW-2121
CONTRACT_GRANT: NAGW-1062
Distribution Limits
Public
Copyright
Other