XMMU J174716.1-281048: a ``quasi-persistent'' very faint X-ray transient?
Abstract
The X-ray transient XMMU J174716.1-281048 was serendipitously discovered with XMM-Newton in 2003. It lies about 0.9 degrees off the Galactic Centre and its spectrum shows a high absorption (~8× 1022 cm-2). Previous X-ray observations of the source field performed in 2000 and 2001 did not detect the source, indicative of a quiescent emission at least two orders of magnitude fainter. The low luminosity during the outburst (~5×1034 erg s-1 at 8 kpc) indicates that the source is a member of the “very faint X-ray transients” class. On 2005 March 22nd the INTEGRAL satellite caught a possible type-I X-ray burst from the new INTEGRAL source IGR J17464-2811, classified as fast X-ray transient. This source was soon found to be positionally coincident, within the uncertainties, with XMMU J174716.1-281048. Here we report data analysis of the X-ray burst observed with the IBIS and JEM-X telescopes and confirm the type-I burst nature. We also re-analysed XMM-Newton and Chandra archival observations of the source field. We discuss the implications of these new findings, particularly related to the source distance as well as the source classification.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 2007
- DOI:
- 10.1051/0004-6361:20077536
- arXiv:
- arXiv:0704.2134
- Bibcode:
- 2007A&A...468L..17D
- Keywords:
-
- Galaxy: center;
- X-rays: binaries;
- stars: neutron;
- X-rays: bursts;
- X-ray: individuals: XMMU J174716.1-281048;
- Astrophysics
- E-Print:
- 4 pages, 8 figures, accepted for publication in A&