Letter | Published:

New highly variable radio source, possible counterpart of γ-ray source CG135+1

Naturevolume 272pages704706 (1978) | Download Citation



THE discovery of a highly variable radio source which coincides in position with cosmic γ-ray source CG135+1 (ref. 1) is reported here. The radio source, which we designate GT 0236+610, was discovered during a survey of the galactic plane for a class of highly variable radio sources. The survey was aimed at the detection of sources whose radio emission is normally very weak or absent but which from time to time exhibit short periods of intense radio emission. The prototype of this class of object is the X-ray source Cyg X–3 which was found2 to exhibit giant radio outbursts of duration approximately 1 week at irregular intervals of a few months. The survey consisted of repeatedly mapping an area of approximately 50 deg2 along the galactic plane, every day for 19 d. The daily results were subtracted from the average of the 19 d for evidence of variability.

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  1. Physics Department, University of British Columbia, Vancouver, British Columbia, Canada

    • P. C. GREGORY
    •  & A. R. TAYLOR


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