Optical Candidate for LMC X-1
Abstract
M. Pakull, European Southern Observatory, reports: "Spectra of the 14.5-mag star 32 (Cowley et al. 1978, A.J. 83, 1619) were obtained with the 3.6-m telescope and the image dissector scanner. They show He II 468.6-nm and N III-C III 464-465-nm emissions with strength comparable to that seen in most massive x-ray binary systems (0.08-nm equivalent width for the He II 468.6-nm emission line). The star is separated by 6" from the previously suggested counterpart, R 148, and lies within 4" of the most probable HEAO-1 position for LMC X-1 (Johnston et al. 1979, Ap.J. 233, 514). The position of star 32 has been determined to be R.A. = 5h40m05s.5, Decl. = -69o46'03".6 (equinox 1950.0, rms error 0".5)."
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- May 1980
- Bibcode:
- 1980IAUC.3472....2P