University of california at Santa Barbara Anisotropy Program: degree scale results from the South Pole 1990-1991.

We report on the preliminary result of a search for anisotropy in the cosmic background radiation (CBR). Our receiver operates with four equally spaced channels from 25 to 35 GHz with a beam size of approximately 1.5 degrees full width at half maximum. The system operated successfully for 500 hr at...

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Bibliographic Details
Main Authors: Gaier, T, Schuster, J, Gundersen, J, Meinhold, P, Lubin, P
Format: Text
Language:English
Published: 1993
Subjects:
Research Article
Austral
South Pole
South pole
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC46598
http://www.ncbi.nlm.nih.gov/pubmed/11607385
Description
Summary:We report on the preliminary result of a search for anisotropy in the cosmic background radiation (CBR). Our receiver operates with four equally spaced channels from 25 to 35 GHz with a beam size of approximately 1.5 degrees full width at half maximum. The system operated successfully for 500 hr at the South Pole during 1990-1991 austral summer. The data from one region, representing 25 hr after editing, are presented here. A strong signal is present in the lower-frequency channels with a spectrum unlike CBR fluctuations. The highest-frequency channel has the smallest contribution from this signal and has been used to set a 95% confidence level upper limit DeltaT/T </= 1.4 10-5.

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