The transient neutron star X-ray binary KS 1741-293 in outburst and quiescence
Abstract
KS 1741-293 is a transient neutron star low-mass X-ray binary that is located at an angular distance of ~20' from the Galactic center. We map out the historic activity of the source since its discovery in 1989, characterize its most recent X-ray outbursts observed with Swift (2007, 2008, 2010, and 2011), and discuss its quiescent X-ray properties using archival Chandra data. KS 1741-293 is frequently active, exhibiting outbursts that typically reach a 2-10 keV luminosity of Lx~1E36 (D/6.2 kpc)^2 erg/s and last for several weeks-months. However, Swift also captured a very short and weak accretion outburst that had a duration of <4 days and did not reach above Lx~5E34 (D/6.2 kpc)^2 erg/s. The source is detected in quiescence with Chandra at a 2-10 keV luminosity of Lx~2.5E32 (D/6.2 kpc)^2 erg/s.
Keywords
Cite
@article{arxiv.1210.6986,
title = {The transient neutron star X-ray binary KS 1741-293 in outburst and quiescence},
author = {N. Degenaar and R. Wijnands},
journal= {arXiv preprint arXiv:1210.6986},
year = {2015}
}
Comments
Proceedings of IAUS 290 "Feeding Compact Objects: Accretion on All Scales", C. M. Zhang, T. Belloni, M. Mendez & S. N. Zhang (eds.); 4 pages, 2 figures, 1 table, contributed talk