2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/8228We report here the first results of the spectral and timing analysis of our simultaneous INTEGRAL/RXTE observations of GRS 1915+105. The first observation ever performed with INTEGRAL revealed a new class of variability, where changes of luminosity seem driven by changes in the Comptonising medium. The spectro-temporal study of our data taken later, in the steady state, could show the influence of the compact jet in the hard X-rays.4 pages, 3 figures, to be published in the proceedings of the "Semaine de l'Astrophysique Francaise" Scientific Highlights 2004. Eds. F. Combes, D. Barret, T. Contini, F. Meynadier, L. PaganiAstrophysicstext