First INTEGRAL observations of GRS 1915+105
Open Access
- 17 November 2003
- journal article
- letter
- Published by EDP Sciences in Astronomy & Astrophysics
- Vol. 411 (1) , L415-L419
- https://doi.org/10.1051/0004-6361:20031444
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.Keywords
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