Simultaneous INTEGRAL/RXTE observations of GRS 1915+105

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

We report on simultaneous INTEGRAL and RXTE observations of the Galactic micro quasar GRS 1915+105 performed over 2003. While the first observation ever involving INTEGRAL reveal a new class of variability, our nice coverage during spring 2003 caught the source in a common (hard) steady state. Deep analysis of the high energy spectra, and timing properties of the source shows, however, that this steady state presents some peculiarities compared to previous observations. We discuss our results in the framework of theoretical models, and propose an explanation where the high energy behaviour of the source is not simply related to an accretion disc, but also to a steady powerful compact jet.

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