First INTEGRAL observations of GRS 1915+105

被引:29
作者
Hannikainen, DC
Vilhu, O
Rodriguez, J
Brandt, S
Westergaard, NJ
Lund, N
Mocour, I
Durouchoux, P
Belloni, T
Castro-Tirado, A
Charles, PA
Dean, AJ
Fender, RP
Feroci, M
Hakala, P
Hunstead, RW
Kaiser, CR
King, A
Mirabel, IF
Pooley, GG
Poutanen, J
Wu, K
Zdziarski, AA
机构
[1] Univ Helsinki Observ, Helsinki 00014, Finland
[2] INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland
[3] Ctr Etud Saclay, DAPNIA, Serv Astrophys, CNRS,FRE 2591, F-91191 Gif Sur Yvette, France
[4] Danish Space Res Inst, DK-2100 Copenhagen O, Denmark
[5] INAF, Osservatorio Astron Brera, I-23807 Merate, LC, Italy
[6] Inst Astrofis Andalucia, CSIC, E-18080 Granada, Spain
[7] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England
[8] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands
[9] CNR, Sez Roma, Ist Astrofis Spaziale & fis Cosm, I-00133 Rome, Italy
[10] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia
[11] Univ Leicester, Theoret Astrophys Grp, Leicester LE1 7RH, Leics, England
[12] Univ Cambridge, Cavendish Lab, Astrophys Grp, Cambridge CB3 0HE, England
[13] Univ Oulu, Astron Div, Oulu 90014, Finland
[14] UCL, Mullard Space Sci Lab, Holmbury RH5 6NT, Surrey, England
[15] Nicholas Copernicus Astron Ctr, PL-00716 Warsaw, Poland
来源
ASTRONOMY & ASTROPHYSICS | 2003年 / 411卷 / 01期
关键词
X-rays : binaries; X-rays : GRS 1915+105;
D O I
10.1051/0004-6361:20031444
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present data from the first of six monitoring Open Time observations of GRS 1915+105 undertaken with the orbiting INTEGRAL satellite. The source was clearly detected with all three X-ray and gamma-ray instruments on board. GRS 1915+105 was in a highly variable state, as demonstrated by the JEMX-2 and ISGRI lightcurves. These and simultaneous RXTE/PCA lightcurves point to a novel type of variability pattern in the source. In addition, we fit the combined JEM X-2 and ISGRI spectrum between 3-300 keV with a disk blackbody+powerlaw model leading to typical parameter values found earlier at similar luminosity levels. A new transient, IGR J19140+098, was discovered during the present observation.
引用
收藏
页码:L415 / L419
页数:5
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