Faint X-ray sources detected near COS B gamma-ray positions

Details Faint X-ray sources detected near COS B gamma-ray positions Faint X-ray sources detected near COS B gamma-ray positions

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.272..699j&link_type=abstract

Nature, vol. 272, Apr. 20, 1978, p. 699-701.

Astronomy and Astrophysics

Astronomy

22

Cos-B Satellite, Gamma Ray Astronomy, X Ray Sources, Light Curve, Spaceborne Astronomy

Scientific paper

A description is presented of the reanalysis by the point summation technique (PST) of three weak 4U sources which lie within COS B error circles. A survey of the remaining COS B positions which has uncovered a new X-ray source within the CG 075+0 error circle is also considered, and the results of an investigation of the region surrounding CG 195+4 and CG 189+1 are given. On the basis of the 4U catalog only one (or two with the present deeper survey) accidental locations of an X-ray source within a COS error circle is expected. Either a 4U source or a probable new X-ray source near 6 of the 11 unidentified COS B sources is found. It is concluded that there is apparently an excess of X-ray sources consistent with COS B gamma-ray source positions above that expected by chance.

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