INTEGRAL long-term monitoring of the supergiant fast X-ray transient XTE J1739-302

被引：17

作者：

Blay, P. ^{[1
]}

Martinez-Nunez, S. ^{[1
,2
]}

Negueruela, I. ^{[2
]}

Pottschmidt, K. ^{[3
,4
,5
]}

Smith, D. M. ^{[6
,7
]}

Torrejon, J. M. ^{[2
,8
]}

Reig, P. ^{[9
,10
]}

Kretschmar, P. ^{[11
]}

Kreykenbohm, I. ^{[12
,13
]}

机构：

[1] Univ Valencia, Inst Ciencia Mat, Valencia 46071, Spain

[2] Univ Alicante, Dept Fis Ingn Sistemas & Teor Senal, E-03080 Alicante, Spain

[3] Univ Maryland Baltimore Cty, CRESST, Baltimore, MD 21250 USA

[4] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA

[5] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA

[6] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA

[7] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA

[8] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA

[9] Fdn Res & Technol, IESL, Iraklion 71110, Crete, Greece

[10] Univ Crete, Dept Phys, Iraklion 71003, Crete, Greece

[11] ESAC, ESA, Madrid 28691, Spain

[12] Inst Astron & Astrophys, Abt Astron, D-72076 Tubingen, Germany

[13] INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland

来源：

ASTRONOMY & ASTROPHYSICS | 2008年 / 489卷 / 02期

关键词：

binaries : close; supergiants; X-rays : binaries;

D O I：

10.1051/0004-6361:200809385

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. In the past few years, a new class of high mass X-ray binaries (HMXRB) has been claimed to exist, the supergiant fast X-ray transients (SFXT). These are X-ray binary systems with a compact companion orbiting a supergiant star which show very short and bright outbursts in a series of activity periods overimposed on longer quiescent periods. Only very recently the first attempts to model the behaviour of these sources have been published, some of them within the framework of accretion from clumpy stellar winds. Aims. Our goal is to analyze the properties of XTE J1739-302/IGR J17391-3021 within the context of the clumpy structure of the supergiant wind. Methods. We have used INTEGRAL and RXTE/PCA observations to obtain broad band (1-200 keV) spectra and light curves of XTE J1739-302 and investigate its X-ray spectrum and temporal variability. Results. We have found that XTE J1739-302 follows a much more complex behaviour than expected. Far from presenting a regular variability pattern, XTE J1739-302 shows periods of high, intermediate, and low flaring activity.

引用

页码：669 / 676

页数：8

共 41 条

[1] Further evidence for the presence of a neutron star in 4U 2206+54. INTEGRAL and VLA observations [J].