First INTEGRAL observations of GRS 1915+105

被引：0

作者：

机构：

[1] Hannikainen, D.C.

[2] 1,Vilhu, O.

[3] 2,Rodriguez, J.

[4] Brandt, S.

[5] Westergaard, N.J.

[6] Lund, N.

[7] Mocœur, I.

[8] Durouchoux, Ph.

[9] Belloni, T.

[10] Castro-Tirado, A.

[11] Charles, P.A.

[12] Dean, A.J.

[13] Fender, R.P.

[14] Feroci, M.

[15] Hakala, P.

[16] Hunstead, R.W.

[17] Kaiser, C.R.

[18] King, A.

[19] Mirabel, I.F.

[20] Pooley, G.G.

[21] Poutanen, J.

[22] Wu, K.

[23] Zdziarski, A.A.

来源：

Hannikainen, D.C. (diana@astro.helsinki.fi) | 1600年 / EDP Sciences卷 / 411期

关键词：

Gamma rays - Light absorption - Luminescence - Satellite observatories - Space research - Spectrum analysis - Telescopes - X rays;

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摘要：

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.

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