The optical counterpart of GX 339-4, a possible black hole X-ray source

Details The optical counterpart of GX 339-4, a possible black hole X-ray source The optical counterpart of GX 339-4, a possible black hole X-ray source

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...232l..33g&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 232, Aug. 15, 1979, p. L33-L37.

Astronomy and Astrophysics

Astronomy

35

Astronomical Photometry, Black Holes (Astronomy), Galactic Radiation, Optical Emission Spectroscopy, Spaceborne Astronomy, X Ray Sources, B Stars, Binary Stars, Companion Stars, Emission Spectra, Heao 3, Main Sequence Stars, Ubv Spectra

Scientific paper

Optical studies of the galactic X-ray source GX 339-4 (4U 1658-48), which led to its recent identification as reported by Doxsey et al. (1979), are presented. Reddening and distance estimates are given, as well as evidence for optical variability on differing time scales. The emission-line spectra and UBV photometry suggest that GX 339-4 may be at about 8 kpc and have a main-sequence B star binary companion. Both the optical spectrum and optical/X-ray luminosity ratio for GX 339-4 may be similar to Cir X-1.

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