XMM-Newton observations of four high mass X-ray binaries and IGR J17348-2045
Abstract
We present the results of the XMM-Newton observations of five hard X-ray emitters: IGR J08262-3736, IGR J17354-3255, IGR J16328-4726, SAX J1818.6-1703, and IGR J17348-2045. The first source is a confirmed supergiant high mass X-ray binary, the following two are candidates supergiant fast X-ray transients, SAX J1818.6-1703 is a confirmed supergiant fast X-ray transient and IGR J17348-2045 is one of the still unidentified objects discovered with INTEGRAL. The XMM-Newton observations permitted the first detailed soft X-ray spectral and timing study of IGR J08262-3736 and provided further support in favor of the association of IGR J17354-3255 and IGR J16328-4726 with the supergiant fast X-ray transients. SAX J1818.6-1703 was not detected by XMM-Newton, thus supporting the idea that this source reaches its lowest X-ray luminosity ( ≃ 1032 erg s-1) around apastron. For IGR J17348-2045 we identified for the first time the soft X-ray counterpart and proposed the association with a close-by radio object, suggestive of an extragalactic origin.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- August 2012
- DOI:
- 10.1051/0004-6361/201218900
- arXiv:
- arXiv:1207.3719
- Bibcode:
- 2012A&A...544A.118B
- Keywords:
-
- stars: emission-line;
- Be;
- X-rays: binaries;
- gamma rays: stars;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 9 pages, 9 figures. Accepted for publication in A&