Lambda 6-cm observations of fluctuations in the 3 K cosmic microwave background

Details Lambda 6-cm observations of fluctuations in the 3 K cosmic microwave background Lambda 6-cm observations of fluctuations in the 3 K cosmic microwave background

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203.1137l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 203, June 1983, p. 1137-1169.

Astronomy and Astrophysics

Astronomy

45

Background Radiation, Centimeter Waves, Microwave Emission, Radiation Measurement, Fluctuation Theory, Galactic Clusters, Northern Sky, Sidereal Time, Statistical Analysis

Scientific paper

The design and execution of the first in a series of experiments to measure fluctuations in the cosmic microwave background (CMB) at a wavelength of 6 cm on angular scales from 10 to 60 arcmin are described. It is noted that at this wavelength the atmosphere has a negligible effect on the observations, and a high degree of repeatability in the data is demonstrated. Particular attention is given to identifying and then eliminating systematic effects which have limited previous experiments. These effects repeat in hour angle (HA) and derive from the telescope environment. The statistical procedures used are discussed in detail so that the results can be compared critically with earlier work. The removal of systematic effects arising from the HA baseline and known sources in the field is described, together with the hypothesis tests required in obtaining an estimate of the CMB fluctuations. A description is also given of the derivation of fluctuations on scales larger than the beam.

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