CHANDRA OBSERVATIONS OF FIVE INTEGRAL SOURCES: NEW X-RAY POSITIONS FOR IGR J16393-4643 AND IGR J17091-3624

被引：24
|
作者：
Bodaghee, A. [1 ]
Rahoui, F. [2 ]
Tomsick, J. A. [1 ]
Rodriguez, J. [3 ]
机构：
[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
[2] Harvard Univ, Dept Astron, Cambridge, MA 02138 USA
[3] Univ Paris Diderot, CNRS, INSU, Lab AIM,CEA,IRFU,CEA DSM,SAp,Ctr Saclay, F-91191 Gif Sur Yvette, France
来源：
ASTROPHYSICAL JOURNAL | 2012年 / 751卷 / 02期
基金：
美国国家航空航天局; 美国国家科学基金会;
关键词：
accretion; accretion disks; gamma rays: general; stars: neutron; X-rays: binaries; X-rays: individuals (IGR J14043-6148; IGR J16358-4726; IGR J16393-4643; IGR J17091-3624; IGR J17597-2201); BLACK-HOLE CANDIDATE; RESOLUTION CAMERA HRC; GALACTIC PLANE SURVEY; REPEATER SGR 1627-41; MULTIWAVELENGTH OBSERVATIONS; XMM-NEWTON; COMPANION STAR; SURVEY CATALOG; FOLLOW-UP; J16358-4726;
D O I：
10.1088/0004-637X/751/2/113
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The Chandra High Resolution Camera observed the fields of five hard X-ray sources in order to help us obtain X-ray coordinates with subarcsecond precision. These observations provide the most accurate X-ray positions known for IGR J16393-4643 and IGR J17091-3624. The obscured X-ray pulsar IGR J16393-4643 lies at R. A. (J2000) = 16(h)39(m)05(s).47, and decl. = -46 degrees 42'13 ''.0 (error radius of 0 ''.6 at 90% confidence). This position is incompatible with the previously proposed counterpart 2MASS J16390535-4642137, and it points instead to a new counterpart candidate that is possibly blended with the Two Micron All Sky Survey star. The black hole candidate IGR J17091-3624 was observed during its 2011 outburst providing coordinates of R.A. = 17(h)09(m)07(s).59, and decl. = -36 degrees 24'25 ''.4. This position is compatible with those of the proposed optical/IR and radio counterparts, solidifying the source's status as a microquasar. Three targets, IGR J14043-6148, IGR J16358-4726, and IGR J17597-2201, were not detected. We obtained 3 sigma upper limits of, respectively, 1.7, 1.8, and 1.5 x 10(-12) erg cm(-2) s(-1) on their 2-10 keV fluxes.
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页数：6
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