Volume 406, Number 1, July IV 2003
|Page(s)||299 - 304|
|Section||Stellar structure and evolution|
|Published online||17 November 2003|
- study of the persistent X-ray source 1E 1743.1–2843 located in the Galactic Center direction
Service d'Astrophysique, CNRS URA 2052, CEA Saclay, 91191 Gif-sur-Yvette, France
2 Integral Science Data Center, Chemin d'Ecogia 16, 1290 Versoix, Switzerland
3 Université Paris VII, fédération APC, 2 place Jussieu, 75005 Paris Cedex, France
4 X-Ray Astronomy Group, Department of Physics and Astronomy, Leicester University, LE1 7RH, UK
Corresponding author: D. Porquet, firstname.lastname@example.org (current address)
Accepted: 20 May 2003
We report the results of an XMM-Newton observation of the persistent X–ray source 1E 1743.1–2843, located in the Galactic Center (GC) direction. We determine the position of the source at , (with an uncertainty of 1.5″), which is the most accurate to date, and will enable cross-identifications at other wavelengths. The source was bright during this observation ( erg s-1 for a power-law continuum), with no significant variability. We propose that 1E 1743.1–2843 may be explained in terms of a black hole candidate in a low/hard state. There is an indication that the source exhibits different states from a comparison of our results with previous observations (e.g., ART-P, BeppoSAX). However, the present spectral analysis does not rule out the hypothesis of a neutron star low-mass X-ray binary as suggested previously. If 1E 1743.1–2843 is actually located in the GC region, we might expect to observe significant 6.4 keV fluorescent iron line emission from nearby molecular clouds (e.g., GCM+0.25+0.01).
Key words: X-rays: general / X-rays individual: 1E 1743.1–2843 / stars: neutron / black hole physics / stars: binaries: general
© ESO, 2003
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