Oh Observations in the Directions of Galactic Thermal Sources

Abstract

A survey for the hydroxyl line radiation has been made in the directions of 30 radio sources (most of them thermal) with the 210 ft telescope of beamwidth 12'· 2 and the multichannel line receiver of bandwidths 10 and 37 kHz. The line at frequency 1665·401 MHz was observed for all sources and the other three lines at 1612, 1667, and 1720 MHz were observed for 10 of the more important sources. The latter were investigated for circular and linear polarization.