Abstract
The error circles for the 10 unidentified COS-B γ-ray sources have been examined for X-ray emission. Three of these sources were found to contain known X-ray sources within their error circles: the positional uncertainty of CG135+1 contains 4U0241+61, CG312−1 contains MX1406−61 and 4U1416−62, and CG327−0 contains 2S1553minus;542. Spectra and variability, as well as positional coincidence, are used to argue that 4U0241+61, MX1406−61 and 2S1533−542 are possible X-ray counterparts to the γ-ray sources.
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Maraschi, L., Markert, T., Apparao, K. et al. Possible X-ray counterparts of γ-ray sources. Nature 272, 679–681 (1978). https://doi.org/10.1038/272679a0
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DOI: https://doi.org/10.1038/272679a0
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