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Noise correlations in cosmic microwave background experimentsMany analysis of microwave background experiments neglect the correlation of noise in different frequency of polarization channels. We show that these correlations, should they be present, can lead to serve misinterpretation of an experiment. In particular, correlated noise arising from either electronics or atmosphere may mimic a cosmic signal. We quantify how the likelihood function for a given experiment varies with noise correlation, using both simple analytic models and actual data. For a typical microwave background anisotropy experiment, noise correlations at the level of 1% of the overall noise can seriously reduce the significance of a given detection.
Document ID
19950042618
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Dodelson, Scott (NASAFermilab Astrophysics Center Batavia, IL, United States)
Kosowsky, Arthur (NASAFermilab Astrophysics Center Batavia, IL, United States)
Myers, Steven T. (California Inst. of Technology, Pasadena, CA United States)
Date Acquired
August 16, 2013
Publication Date
February 20, 1995
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 440
Issue: 2
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-2381
Distribution Limits
Public
Copyright
Other