Optical photometry of massive X-ray binaries - 4U 1538-52/QV Nor

Details Optical photometry of massive X-ray binaries - 4U 1538-52/QV Nor Optical photometry of massive X-ray binaries - 4U 1538-52/QV Nor

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...122...79p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 122, no. 1-2, June 1983, p. 79-82.

Astronomy and Astrophysics

Astrophysics

6

Binary Stars, Light Curve, Stellar Spectrophotometry, X Ray Binaries, X Ray Sources, X Ray Stars, Light Modulation, Long Term Effects, Periodic Variations, Ubv Spectra

Scientific paper

The authors present the results of photometric observations of QV Nor, the optical counterpart of the massive X-ray binary source 4U 1538-52. They confirm the ellipsoidal variations first discovered by Ilovaisky, Chevalier and Motch. Depths of the minima at phases 0.0 (X-ray eclipse) and 0.5 are 0.045 ± 0.010 and 0.076 ± 0.010 mag, respectively. The authors find no evidence for a long-term periodic modulation in cycle-to-cycle variations of the light curve. In view of the still limited nature of the data set they consider this a tentative result.

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