BeppoSAX Observations of the galactic source GS1826-238 in a hard X-ray high state

Del Sordo, Stefano; Frontera, Filippo; Pian, Elena; Piraino, Santina; Oosterbroek, Tim; Harmon, B. A.; Palazzi, Eliana; Tavani, Marco; Zhang, S. N.; Parmar, Arvind

BeppoSAX Observations of the galactic source GS1826-238 in a hard X-ray high state

Authors

Description

The BeppoSAX Narrow Field Instruments observed the galactic source GS1826-238 in October 1997, following a hard X-ray outburst with a peak flux of about 100 mCrab detected by BATSE. Two short X-ray bursts (about 150 s) were detected up to 60 keV, with larger amplitude and duration at lower energies(up to a factor 20 times the persistent emission). This confirms the proposed identification of the source as a weakly magnetized neutron star in a LMXRB system. For both persistent and burst states, the spectrum in the 0.4-100 keV energy range is well fitted by an absorbed blackbody, plus a flat power-law with an exponential cutoff at 50 keV.
to appear in the 3rd INTEGRAL WORKSHOP Proceedings