First INTEGRAL observations of GRS 1915+105

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.

5 pages, 7 figures. The original Figure 2 in color can be obtained from http://www.astro.helsinki.fi/~diana/integral.html. Accepted for publication in A&A Letters special INTEGRAL issue

References in corpus (10)

• ISGRI: the INTEGRAL Soft Gamma-Ray Imager
• MERLIN observations of relativistic ejections from GRS 1915+105
• The INTEGRAL Science Data Centre (ISDC)
• The INTEGRAL/IBIS Scientific Data Analysis
• The Chandra HETGS and RXTE view of GRS 1915+105
• High resolution Chandra HETG and RXTE observations of GRS 1915+105 : A hot disk atmosphere & cold gas enriched in Iron and Silicon
• OSSE and RXTE Observations of GRS 1915+105: Evidence for Non-thermal Comptonization
• Identification of the donor in the X-ray binary GRS 1915+105
• In flight calibration of the ISGRI camera
• Thermal Comptonization in GRS 1915+105

Cited by in corpus (19)

• GRS 1915+105 and the Disc-Jet Coupling in Accreting Black Hole Systems
• INTEGRAL/IBIS survey of the Sagittarius Arm Tangent region: A source catalog
• Characterizing a new class of variability in GRS 1915+105 with simultaneous INTEGRAL/RXTE observations
• Spectral Properties of Low Quasi-Periodic Oscillations in GRS 1915+105
• The XMM-Newton View of GRS1915+105
• The INTEGRAL view on Black Hole X-ray Binaries
• Exploring the Long-Term Evolution of GRS 1915+105
• The complex behaviour of the microquasar GRS 1915+105 in the rho class observed with BeppoSAX. I: Timing analysis
• Testing evolution of LFQPOs with mass accretion rate in GRS 1915+105 with Insight-HXMT
• Discovery of a new INTEGRAL source: IGR J19140+0951
• Non-linear oscillator models for the X-ray bursting of the microquasar GRS 1915+105
• 15 years of Galactic surveys and hard X-ray Background measurements
• The evolution of the high-frequency variability in the black hole candidate GRS 1915+105 as seen by RXTE
• Inner Disc Obscuration in GRS 1915+105 Based on Relativistic Slim Disc Model
• Time-resolved spectroscopy on the heartbeat state of GRS 1915+105 using AstroSat
• A non-linear mathematical model for the X-ray variability classes of the microquasar GRS 1915+105 -- II: transition and swaying classes
• Using the bispectrum to probe radio X-ray correlations in GRS 1915+105
• A non-linear mathematical model for the X-ray variability classes of the microquasar GRS 1915+105 -- I: quiescent, spiking states and QPOs
• Light curve fingerprints: an automated approach to the extraction of X-ray variability patterns with feature aggregation -- an example application to GRS 1915+105