Monthly Notices of the Royal Astronomical Society
We present the results of spectroscopic and UBV observations of the brightest star in the error box of the X-ray source H 0544–665. This object is a B0–1 V star and a member of the LMC. It shows correlated variations in brightness and colour indices. We suggest that it is a Be-type star observed during a stage of low emission strength. Although a relation between this star and the X-ray source has still to be proven the present data add considerable support to the proposed identification.
van der Klis, M.; van Paradijs, J.; Charles, P. A.; and Thorstensen, J. R., "Photometric and Spectroscopic Observations of an Optical Candidate for the X-Ray Source H 0544 - 665" (1983). Open Dartmouth: Faculty Open Access Articles. 1885.