New limits on small-scale anisotropy in the microwave background

Details New limits on small-scale anisotropy in the microwave background New limits on small-scale anisotropy in the microwave background

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...277l...1u&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 277, Feb. 1, 1984, p. L1-L3. NSF-supported research

Astronomy and Astrophysics

Astronomy

128

Anisotropy, Microwaves, Radio Astronomy, Relic Radiation, Background Radiation, Beam Switching, Statistical Analysis

Scientific paper

The authors have searched for small-scale anisotropy in the cosmic microwave background using the maser receiver and 140 foot telescope of the NRAO, operating at a frequency of 19.5 GHz. The half-power beamwidth was 1arcmin.5. Beam switching by 4arcmin.5 was used in order to minimize variable contributions from ground and atmospheric emission and from the instrument. The data set an upper limit of (ΔT/T)rms < 4.5×10-5 at the 95% confidence level on fluctuations at the 4arcmin.5 scale.

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