Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.210..863v&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 210, Oct. 15, 1984, p. 863-871.
Astronomy and Astrophysics
Astronomy
8
Stellar Spectrophotometry, X Ray Sources, B Stars, Light Curve, Periodic Variations, Spectral Energy Distribution, Stellar Color, Stellar Magnitude, Ubv Spectra, Visible Spectrum
Scientific paper
The authors present the results of photometric observations of the optical counterpart of the recurrent X-ray transient A0538-66. Three outbursts were observed in 1982 April and May. During the period 1982 October - 1983 February the source did not show outbursts. Combining their data with those of Densham et al. the authors find evidence for a secular decrease of the size of the outbursts throughout a period of activity. The interoutburst UBV properties of A0538-66 likewise show a progressive change. During the off-state A0538-66 shows small-amplitude variability, similar to that observed in some 'normal' Be stars. In the (V, B-V) and (U-B, B-V) diagrams both these variations and the secular variations of the previous interoutburst data lie along tracks which appear to be connected.
de Kool Martijn
Deul Erik R.
Greve Albert
Lub Jan
Pakull Manfred
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