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The Be/X-ray transient KS 1947+300

Negueruela, I.; Israel, G. L.; Marco, A.; Norton, A. J. and Speziali, R. (2003). The Be/X-ray transient KS 1947+300. Astronomy & Astrophysics, 397(2) pp. 739–746.

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We present optical spectroscopy and optical and infrared photometry of the counterpart to the transient X-ray source KS 1947+300. The counterpart is shown to be a moderately reddened $V=14.2$ early-type Be star located in an area of low interstellar absorption slightly above the Galactic plane. Changes in brightness are accompanied by correlated reddening of the source, as is expected in this kind of object. From intermediate resolution spectroscopy, we derive a spectral type B0Ve. If the intrinsic luminosity of the star is normal for its spectral type, KS 1947+300 is situated at a distance of ~10 kpc, implying that its X-ray luminosity at the peak of the spring 2000 X-ray outburst was typical of Type II outbursts in Be/X-ray transients. KS 1947+300 is thus the first Be/X-ray recurrent transient showing Type II outbursts which has an almost circular orbit.

Item Type: Journal Item
Copyright Holders: 2003 ESO
ISSN: 1432-0746
Keywords: stars; emission line; KS 1947+300; close binaries; close stars; neutron; X-ray
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 4646
Depositing User: Users 6041 not found.
Date Deposited: 11 Jul 2006
Last Modified: 11 Jun 2020 23:14
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