Mathematics – Logic
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975stin...7630137w&link_type=abstract
Unknown
Mathematics
Logic
Cosmic Rays, Spectrum Analysis, Submillimeter Waves, Balloon-Borne Instruments, Big Bang Cosmology, Black Body Radiation, Calibrating, Spectrophotometers
Scientific paper
An experimental measurement of the spectrum of the submillimeter cosmic background radiation is described. The experiment consists of measuring the night sky emission at an altitude of 39 km, correcting for the atmospheric molecular line emission, and placing limits on the contamination from sources of continuum radiation such as the apparatus itself and the earth. The observations were made on 24 July 1974 using a fully calibrated liquid-helium-cooled balloon-borne spectrophotometer. Important features of the apparatus include a cooled antenna, a polarizing interferometer, and a germanium bolometric detector. The characterization of the spectrophotometer includes the large angle response and emission of the antenna. The calibration of the instrument and corrections to the observed sky spectrum are based on measurements made during the flight. A simple model of the molecular line emission was used to determine the atmospheric contribution. A 3 K black body is examined and the Big Bang cosmological theory is discussed.
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