An Ultrasoft Transient X-Ray Source near the Galactic Bulge Region

Details An Ultrasoft Transient X-Ray Source near the Galactic Bulge Region An Ultrasoft Transient X-Ray Source near the Galactic Bulge Region

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004pasj...56..803y&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.56, No.5, pp. 803-808

Astronomy and Astrophysics

Astronomy

1

Accretion: Accretion Disks, Stars: Individual (Gs 1732-273), X-Rays: Spectra, X-Rays: Stars, X-Rays: Transients

Scientific paper

Further analysis of an ultrasoft transient X-ray source near the Galactic bulge region is reported. This source was discovered in scanning observations with Ginga, and was at first designated as GS 1734-275 (Makino 1988). The source position was re-determined using revised satellite attitude data, and then this source was named GS 1732-273. The revised position is in agreement with those of the transient sources, KS 1732-273, discovered with Mir-Kvant in 1989, and 1RXS J173602.0-272541, discovered with the ROSAT all-sky survey in 1990. The X-ray spectrum, constructed by a scan-fit technique, is well represented by a multicolor disk model with a temperature at the inner disk radius of 0.7-0.8keV. The spectral properties and the transient behavior suggest that GS 1732-273 is a candidate source of black hole binaries.

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