The Cygnus X Complex

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Abstract
Detailed observations of the Cygnus X region have been obtained at a frequency of 3200 Mc/s using the 10-metre parabolic reflector of the National Research Council of Canada. The resultant contour map shows this region to be very complex, having more than thirty bright condensations. A flux density has been computed for each and an angular size has been estimated for all sources larger than twenty minutes of arc. Of particular interest is the strong source at right ascension 20 h 21 m .2, declination 40° 08′, presently known as the γ -Cygni source. A derived spectral index of −0.4 and its large angular size lead to the hypothesis that this source is the remnant of a type II supernova at a distance of 300–1650 parsecs.

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