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

THE Uhuru data has been superimposed with a point summation technique (PST) on the positions of the 11 unidentified COS B γ-ray sources¹. For the other COS B sources, SAS 2 has identified CB185-5 with NP0532 (Crab pulsar) and CG263-2 with the Vela pulsar^2-4. We describe here first, the reanalysis by the PST of three weak 4U sources which lie within COS B error circles; second, a survey of the remaining COS B positions which has uncovered a new X-ray source within the CG075+0 error circle; and third, the results of an investigation of the region surrounding CG195+4 and CG189+1.