First INTEGRAL observations of eight persistent neutron star low mass X-ray binaries

被引：10

作者：

Paizis, A

Beckmann, V

Courvoisier, TJL

Vilhu, O

Lutovinov, A

Ebisawa, K

Hannikainen, D

Chernyakova, M

Heras, JAZ

Rodriguez, J

Zdziarski, AA

Bazzano, A

Kuulkers, E

Oosterbroek, T

Frontera, F

Gimenez, A

Goldoni, P

Santangelo, A

Palumbo, GGC

机构：

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

[2] CNR, IASF, Sez Milano, I-20133 Milan, Italy

[3] Univ Tubingen, Inst Astron & Astrophys, D-72076 Tubingen, Germany

[4] Observ Geneva, CH-1290 Sauverny, Switzerland

[5] Univ Helsinki, FIN-00014 Helsinki, Finland

[6] Space Res Inst, IKI, High Energy Dept, Moscow 117810, Russia

[7] CEA Saclay, DSM DAPIA SAp, CNRS, FRE 2591, F-91191 Gif Sur Yvette, France

[8] Nicholas Copernicus Astron Ctr, PL-00716 Warsaw, Poland

[9] CNR, IASF, Sez Roma, I-00133 Rome, Italy

[10] European Space Agcy, Estec, Res & Sci Support Dept, NL-2200 AG Noordwijk, Netherlands

[11] Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy

[12] Inst Nacl Tecn Aerospacial, Madrid 28850, Spain

[13] CEA Saclay, DSM DAPNIA SAp, F-91191 Gif Sur Yvette, France

[14] CNR, IASF, Sez Palermo, I-90146 Palermo, Italy

[15] Univ Bologna, I-40127 Bologna, Italy

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 411卷 / 01期

关键词：

stars : neutron; binaries : close; X-rays : binaries; INTEGRAL sources;

D O I：

10.1051/0004-6361:20031207

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Early results from the INTEGRAL Core Program, for a sample of eight persistently bright neutron star low mass X-ray binaries in the energy range from 5 keV to 200 keV, are presented. It is shown that INTEGRAL efficiently detects sources and that spectra may be obtained up to several hundreds of keV by combining data from three of the four INTEGRAL instruments: JEM-X, IBIS and SPI. For the source GX 17+2 it is shown that the spectrum extends well above 100 keV with a flattening above 30 keV. This might suggest a non-thermal comptonisation emission, but uncertainties in the current data reduction and background determination do not allow firm conclusions to be drawn yet.

引用

页码：L363 / L367

页数：5

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