A search for anisotropy in the Cosmic Microwave Background Radiation

Details A search for anisotropy in the Cosmic Microwave Background Radiation A search for anisotropy in the Cosmic Microwave Background Radiation

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phdt........30r&link_type=abstract

PhD Dissertation, Princeton Univ. NJ United States

Physics

6

Anisotropy, Background Radiation, Microwaves, Bolometers, Extraterrestrial Radio Waves, Telescopes, Sensitivity, Microwave Radiometers

Scientific paper

This thesis describes an instrument designed to search for medium angular scale anisotropies in the Cosmic Microwave Background Radiation, and observations made with that instrument from the South Pole. The system is an array of four bolometric detectors cooled to 50 mK, mounted on an approximately 3/4 m off-axis prime focus telescope. The detectors are sensitive to radiation near lambda = 3 mm, and the system has FWHM beams of 0.75 deg which are chopped +/- 2.75 deg on the sky. Two weeks of data were acquired, and statistically significant deviations from zero signal were found at the Delta TA approximately equals 100 micro-K level. Concern with possible foreground sources prevents the identification of the origin of these signals.

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