LMC X-2 - an extragalactic bulge-type source

Details LMC X-2 - an extragalactic bulge-type source LMC X-2 - an extragalactic bulge-type source

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...213...97b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 213, no. 1-2, April 1989, p. 97-106.

Astronomy and Astrophysics

Astrophysics

20

Light Curve, Magellanic Clouds, Neutron Stars, X Ray Binaries, X Ray Spectroscopy, Astronomical Photometry, Astronomical Spectroscopy, Exosat Satellite, Stellar Luminosity

Scientific paper

The X-ray source LMC X-2 was observed with Exosat for about 8 h on February 2, 1984 with simultaneous photometric and spectroscopic optical coverage. The source was seen at a luminosity of about 1.5 x 10 to the 38th erg/s, with a mean X-ray spectrum which can be described equally well by either the superposition of thermal emission from an optically thin plasma and a blackbody or by a comptonized thermal model. The mean X-ray spectrum is found to be very similar to those of the bright galactic bulge sources. The source is only moderately variable in X-rays, with spectral variations similar to those seen from Sco X-1 in quiescence. No coherent periodic (0.016-2500s) pulsations were detected. Large photometric optical variations are present which suggest an orbital period of 6.4h, although at a low level of significance. There is no clear correlation between X-ray and optical variations.

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