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Prompt and delayed emission properties of Gamma-Ray Bursts observed with BeppoSAX
F. Frontera, L. Amati, E. Costa +14
We investigated the spectral evolution in the 2--700 keV energy band of Gamma-Ray Bursts (GRBs) detected by the Gamma-Ray Burst Monitor (GRBM) and localized with the Wide Field Cam…
BeppoSAX Observations of GRB980425: Detection of the Prompt Event and Monitoring of the Error Box
E. Pian, L. Amati, L. A. Antonelli +25
We present BeppoSAX follow-up observations of GRB980425 obtained with the Narrow Field Instruments (NFI) in April, May, and November 1998. The first NFI observation has detected wi…
Inner accretion disk disappearance during a radio flare in GRS 1915+105
M. Feroci, G. Matt, G. Pooley +3
Simultaneous X-ray (BeppoSAX, 0.1-300 keV) and radio (Ryle Telescope, 15 GHz) observations of the superluminal galactic source GRS 1915+105 in high flux state were carried out star…
The Radio Afterglow and the Host Galaxy of the X-Ray Rich GRB 981226
D. A. Frail, S. R. Kulkarni, J. S. Bloom +9
We report the discovery of a radio transient VLA 232937.2-235553, coincident with the proposed X-ray afterglow for the gamma-ray burst GRB 981226. This GRB has the highest ratio of…
Iron line signatures in X-ray afterglows of GRB by BeppoSAX
L. Piro, E. Costa, M. Feroci +12
We report the possible detection (99.3% of statistical significance) of redshifted Fe iron line emission in the X-ray afterglow of Gamma-ray burst GRB970508 observed by BeppoSAX. I…
The X-ray, Optical and Infrared Counterpart to GRB 980703
P. M. Vreeswijk, T. J. Galama, A. Owens +36
We report on X-ray, optical and infrared follow-up observations of GRB 980703. We detect a previously unknown X-ray source in the GRB error box; assuming a power law decline we fin…