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Very faint X-ray transients in our Galaxy

Published online by Cambridge University Press:  12 May 2006

Rudy Wijnands
Rudy Wijnands
Affiliation:
Astronomical Institute “Anton Pannekoek”, University of Amsterdam, Kruislaan 403, 1098 SJ, Amsterdam, The Netherlands email: rudy@science.uva.nl
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Abstract

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We present the first results of our X-ray monitoring campaign using the X-ray satellites XMM-Newton and Chandra on the 1.7 square degree region centered on Sgr A*. The purpose of this campaign is to monitor the X-ray behavior of X-ray sources (both persistent and transient ones) which are too faint to be detected by monitoring instruments aboard other satellites currently in orbit (e.g., RXTE, Integral, Swift). Our first observations were obtained on June 5, 2005, using the HRC-I detector aboard Chandra. Here we briefly discuss our results on the very faint X-ray transients we detected during these observations. We detected new outbursts (with peak luminosities close to $10^{36}$ erg s$^{-1}$) of the two very faint transients GRS 1741.9–2853 and XMM J174457-2850.3, as well as a potential new very faint X-ray transient with an outburst luminosity of a few times $10^{34}$ erg s$^{-1}$.

Keywords

accretionaccretion disksX-rays: binariesstars: neutron
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S230: Populations of High Energy Sources in Galaxies , August 2005 , pp. 328 - 332
Copyright
2006 International Astronomical Union