Abstract
PRECISE (20–40″) positions of seven X-ray sources in the celestial region 320° < lII < 340° are reported here. These include a recurrent transient X-ray source (MX1608–52; refs 1–4) and a source 2S1553–542 (ref. 5) coincident with a γ-ray source6 within the given errors of position. The positions reported here reduce the previously reported areas of the error region for six of the sources by factors ranging between 10 and 100. In the case of MX1608–52, a preliminary report of this work2 led to the identification of an optical candidate7,8. The present results add confidence to the proposed radio candidates for 4U1624–49 (ref. 9) and 4U1642–45 (refs 9, 10). But they eliminate proposed possible optical candidates5,11–14 for the sources 4U1543–62, 2S1553–542, 4U1624–49 and 4U1642–45.
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APPARAO, K., BRADT, H., DOWER, R. et al. Positions of galactic X-ray sources: 320° < lII <340°. Nature 271, 225–228 (1978). https://doi.org/10.1038/271225a0
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DOI: https://doi.org/10.1038/271225a0
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