The orbital period in the supergiant fast X-ray transient IGR J16465-4507

被引：26

作者：

Clark, D. J. ^{[1
,2
]}

Sguera, V. ^{[3
,4
]}

Bird, A. J. ^{[1
]}

McBride, V. A. ^{[1
]}

Hill, A. B. ^{[5
]}

Scaringi, S. ^{[6
]}

Drave, S. ^{[1
]}

Bazzano, A. ^{[4
]}

Dean, A. J. ^{[1
]}

机构：

[1] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

[2] CNRS UPS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse, France

[3] Ist Astrofis Spaziale & Fis Cosm, INAF, I-40129 Bologna, Italy

[4] Ist Astrofis Spaziale & Fis Cosm, INAF, I-00133 Rome, Italy

[5] Univ Grenoble 1, CNRS, Lab Astrophys Grenoble, UMR 5571, F-38041 Grenoble, France

[6] Radboud Univ Nijmegen, IMAPP, Dept Astrophys, NL-6500 GL Nijmegen, Netherlands

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2010年 / 406卷 / 01期

关键词：

gamma-rays: general; X-rays: binaries; X-rays: individual: IGR J16465-4507; UNEVENLY SPACED DATA; TIME-SERIES ANALYSIS; INTEGRAL OBSERVATIONS; SAX J1818.6-1703; NEUTRON-STAR; DISCOVERY; BINARIES; HMXBS;

D O I：

10.1111/j.1745-3933.2010.00885.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Timing analysis of the INTEGRAL-IBIS and Swift-BAT light curves of the supergiant fast X-ray transient (SFXT) IGR J16465-4507 has identified a period of 30.32 +/- 0.02 d which we interpret as the orbital period of the binary system. In addition 11 outbursts (nine of which are previously unpublished) have been found between MJD 52652 and 54764, all of which occur close to the region of the orbit we regard as periastron. From the reported flux outbursts, we found a dynamical range in the interval similar to 30-80. Although in this regard IGR J16465-4507 cannot be considered a classical SFXT for which typical dynamical ranges are > 100, still our reported values are significantly greater than that of classical persistent variable supergiant HMXBs (< 20), supporting the idea that IGR J16465-4507 is an intermediate SFXT system, much like few other similar cases reported in the literature.

引用

页码：L75 / L79

页数：5

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