X-ray pulsations from the region of the supergiant fast X-ray transient IGR J17544-2619

被引：22

作者：

Drave, S. P. ^{[1
]}

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

Townsend, L. J. ^{[1
]}

Hill, A. B. ^{[1
]}

McBride, V. A. ^{[1
,2
,3
]}

Sguera, V. ^{[4
,5
]}

Bazzano, A. ^{[5
]}

Clark, D. J. ^{[6
,7
]}

机构：

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

[2] Univ Cape Town, Astron Grav & Cosmol Ctr, Dept Astron, ZA-7701 Rondebosch, South Africa

[3] S African Astron Observ, ZA-7935 Observatory, South Africa

[4] Ist Astrofis Spaziale & Fis Cosm, INAF IASF, Bologna, Italy

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

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

[7] CREATEC, Unit 8, Cockermouth CA13 0HT, Cumbria, England

来源：

ASTRONOMY & ASTROPHYSICS | 2012年 / 539卷

关键词：

X-rays: binaries; stars:; winds; outflows; pulsars: general; X-rays: individuals: IGR J17544-2619; XMM-NEWTON OBSERVATIONS; GALACTIC RIDGE; XTE J1739-302; ORBITAL PERIOD; NEUTRON-STAR; SPACED DATA; BINARIES; DISCOVERY; EMISSION; CATALOG;

D O I：

10.1051/0004-6361/201117947

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Phase-targeted RXTE observations have allowed us to detect a transient 71.49 +/- 0.02 s signal that is most likely to be originating from the supergiant fast X-ray transient IGR J17544-2619. The phase-folded light curve shows a possible double-peaked structure with a pulsed flux of similar to 4.8 x 10(-12) erg cm(-2) s(-1) (3-10 keV). Assuming the signal to indicate the spin period of the neutron star in the system, the provisional location of IGR J17544- 2619 on the Corbet diagram places the system within the classical wind-fed supergiant XRB region. Such a result illustrates the growing trend of supergiant fast X-ray transients to span across both of the original classes of HMXB in P-orb - P-spin space.

引用

页数：7

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