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Spectral Properties of the Prompt X-ray emission and Afterglow from the Gamma-Ray Burst of 28 February 1997
F. Frontera, E. Costa, L. Piro +18
We report high-energy spectral data of the prompt emission of GRB970228 and its X-ray afterglow. We establish that the nature of the X-ray afterglow emission is non-thermal and sim…
Evidence for a late-time outburst of the X-ray afterglow of GB970508 from BeppoSAX
L. Piro, L. Amati, L. A. Antonelli +15
The gamma-ray burst GB970508 was observed simultaneously by the Gamma Ray Burst Monitor (GRBM) and one of the X-ray Wide Field Cameras (WFC) aboard BeppoSAX. The latter provided a…
Soft X-ray observations of the complex warm absorber in MCG-6-30-15 with BeppoSAX
Astrid Orr, S. Molendi, F. Fiore +3
We report on soft X-ray observations of the Seyfert 1 galaxy MCG-6-30-15 with the Low and Medium Energy Concentrator Spectrometers on board BeppoSAX. The time averaged 0.1-4 keV sp…
Discovery of the X-Ray Afterglow of the Gamma-Ray Burst of February 28 1997
E. Costa, F. Frontera, J. Heise +23
Here we report the discovery in the X-ray band of the first afterglow of a gamma-ray burst. It was detected and quickly positioned by the Beppo-SAX satellite on 1997 February 28 (G…
The complex X-ray spectrum of the low-mass X-ray binary 4U 1626-67
A. Owens, T. Oosterbroek, A. N. Parmar
We report on observations of the X-ray pulsar 4U 1626-67 by the LECS instrument on-board Bepposax. We confirm the recent ASCA discovery of excess emission near 1 keV (Angelini et a…