The unusually soft X-ray spectrum of LMC X-3

Details The unusually soft X-ray spectrum of LMC X-3 The unusually soft X-ray spectrum of LMC X-3

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...281..354w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 281, June 1, 1984, p. 354-359.

Astronomy and Astrophysics

Astronomy

150

Binary Stars, Black Holes (Astronomy), Stellar Spectra, Variable Stars, X Ray Sources, Accretion Disks, Heao, Magellanic Clouds, X Ray Spectra

Scientific paper

Spectral studies of LMC X-3 using the HEAO 1 A-2 experiment and the Einstein Solid State Spectrometer show that the X-ray spectrum is extremely soft relative to the vast majority of galactic accretion-driven X-ray sources, but similar to that of black hole candidates in their 'high state'. Rapid approximately 1 s flickering comparable to that seen from Cyg X-1 in its low state was not detected. In the 1977-1979 interval LMC X-3 was for most (if not all) of its time in a 'high state'. The fact that several other steady and transient X-ray sources also have similarly soft X-ray spectra and should be regarded as potential black hole candidates is noted. The spectra of these sources are not well described by any one simple model.

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