BeppoSAX observation of the superluminal galactic source GRS1915+105

✍ Scribed by Marco Feroci; Enrico Costa; Giorgio Matt; Tomaso Belloni; Marco Tavani

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 248 KB
• Volume: 69
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(98)00235-7

✦ Synopsis

We report on TOO BeppoSAX observations of the superluminal galactic source GtLS1915+105 in its high flux state. The TOO was triggered by the Wide Field Cameras, and the source was then followed up for about a month with a long (100 ksec) observation and a set of nine 10 ksec snapshots. The source exhibited strong flux and spectral variability over the whole energy range (0.1-300 keV).

We present here the spectral analysis carried out on a portion of the longer observation. The low energy (0.1-10 keV) spectrum taken in a phase of lack of spectral variability can be reasonably well fitted with an absorbed power law plus a multicolor blackbody. Clear evidence for a Fe Kc~ emission line at 6.7 keV is also found, which an intensity that may be not directly correlated with continuum flux variation.