Serpens X-1 observed by INTEGRAL

被引：6

作者：

Masetti, N

Foschini, L

Palazzi, E

Beckmann, V

Lund, N

Brandt, S

Westergaard, NJ

Amati, L

Caroli, E

Del Sordo, S

Di Cocco, G

Durouchoux, P

Farinelli, R

Frontera, F

Orlandini, M

Zdziarski, A

机构：

[1] CNR, Sez Bologna, Ist Astrofis Spaziale & Fis Cosm, I-40129 Bologna, Italy

[2] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[3] Univ Maryland Baltimore Cty, Dept Phys, Joint Ctr Astrophys, Baltimore, MD 21250 USA

[4] Danish Space Res Inst, DK-2100 Copenhagen O, Denmark

[5] CNR, Sez Palermo, Ist Astrofis Spaziale & Fis Cosm, I-90146 Palermo, Italy

[6] CEA Saclay, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, France

[7] Univ Ferrara, Dept Phys, I-44100 Ferrara, Italy

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

来源：

ASTRONOMY & ASTROPHYSICS | 2004年 / 423卷 / 02期

关键词：

X-rays : binaries; X-rays : individuals : Ser X-1; stars : neutron;

D O I：

10.1051/0004-6361:20040210

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Here we report results of an INTEGRAL-AO1 observation of the X-ray burst and atoll source Ser X-1 performed in May 2003. The object was observed for a total on-source time of 400 ks but nearly 8degrees off-axis due to its amalgamation with an observation of SS 433, the pointing target source. Ser X-1 has been clearly detected up to 30 keV with unprecedented positional accuracy for high-energy emission. The 20-30 keV light curve showed substantial variability during the observation. Comparison with previous observations indicates that the source was in its high ("banana") state and displayed a soft spectrum during the INTEGRAL pointing. A (non simultaneous) radio-to-gamma-rays broad-band spectral energy distribution is also presented for the first time and discussed.

引用

页码：651 / 656

页数：6

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