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|Title:||First INTEGRAL observations of GRS 1915+105|
|Authors:||Hannikainen, D. C.|
Mirabel, I. F.
Westergaard, N. J.
Charles, P. A.
Dean, A. J.
Kaiser, C. R.
Fender, R. P.
Hunstead, R. W.
Pooley, G. G.
Zdziarski, A. A.
|Publisher:||EDP Sciences for European Southern Observatory (ESO)|
|Citation:||Astronomy & Astrophysics, 2003, 411 (1)|
|Abstract:||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 JEM X-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.|
|Rights:||Copyright © 2003 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
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