A&A 388, 293-297 (2002)
The broad band X-ray spectrum of the black hole candidate GRS 1758-258L. Sidoli and S. Mereghetti
Istituto di Astrofisica Spaziale e Fisica Cosmica - Sezione di Milano "G. Occhialini" - CNR via Bassini 15, 20133 Milano, Italy
(Received 11 February 2002 / Accepted 8 April 2002 )
We present the results of a BeppoSAX observation of the black hole candidate GRS 1758-258 carried out in 1997, while the source was in its low/hard state. The X-ray spectrum, simultaneously observed over the broad energy range from 0.1 to 200 keV, can be well described by a Comptonized emission model with electron temperature keV and optical depth (spherical geometry), although a cut-off power-law and a reflection model cannot be excluded. Additionally, a broad iron line at 6.4 keV with equivalent width EW = 67 +80 -40 eV has been marginally detected. The 0.1-200 keV luminosity is erg s -1 for an assumed distance of 8 kpc. The soft and hard luminosities are such that the source falls inside the so-called "burster box". No evidence for a soft excess is present.
Key words: accretion, accretion disks -- stars: individual: GRS 1758-258 -- X-rays: general
Offprint request: L. Sidoli, email@example.com
© ESO 2002