Observations of outbursts from the recurrent X-ray transient A0538-66 and LMC X-4

Details Observations of outbursts from the recurrent X-ray transient A0538-66 and LMC X-4 Observations of outbursts from the recurrent X-ray transient A0538-66 and LMC X-4

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240..619s&link_type=abstract

Astrophysical Journal, Part 1, vol. 240, Sept. 1, 1980, p. 619-627. Research supported by the Science Research Council;

Astronomy and Astrophysics

Astronomy

63

Magellanic Clouds, Spaceborne Astronomy, X Ray Sources, Heao 1, Light Curve, Periodic Variations, Sky Surveys (Astronomy)

Scientific paper

Nine X-ray outbursts from the LMC have been observed with the HEAO 1 Large-Area Sky Survey Instrument. Some are shown to originate in the recurrent transient A0538-66, confirming the proposed 16 day periodicity and showing that the duration of the events can be as long as 14 days or as short as a few hours. Deviations from precise periodicity can be attributed to phase jitter or to a change in period occurring around the time of an exceptionally long outburst. Other outbursts which are irregular and consistently shorter originate in LMC X-4. A long-term light curve indicates that the LMC X-4 outbursts occur only when the source is in a high state, but are not strongly correlated with the binary phase.

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