Positions of galactic X-ray sources: 20° < lII < 55°

Abstract

Precise positions, determined with data from the SAS-3 X-ray observatory, are presented for eight galactic plane X-ray sources (Aq1 X-1, Ser X-1, 3U1956 + 11, 3U1822−00, 3U1915−05, A1845−02, A1850−08, A1905+00). Error radii for the positions range from 20 to 50 arc s. Previously proposed optical identifications of three of the sources (Ser X-1, 3U1956 + 11, A1850−08) are supported by these results. Three (Ser X-1, A1905+00, 3U1915−05) have been identified as X-ray burst sources.

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Doxsey, R., Apparao, K., Bradt, H. et al. Positions of galactic X-ray sources: 20° < lII < 55°. Nature 269, 112–116 (1977). https://doi.org/10.1038/269112a0

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