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X-ray and optical monitoring of the peculiar source 4U 1700+24/V934 Her
N. Masetti, D. Dal Fiume, G. Cusumano +10
(Abridged) We report on ASCA and BeppoSAX observations of the X-ray source 4U 1700+24 and on (quasi-)simultaneous spectroscopy of its optical counterpart, V934 Her, from the Loiano…
A measurement of the broad-band spectrum of XTE J1118+480 with BeppoSAX and its astrophysical implications
F. Frontera, A. A. Zdziarski, L. Amati +12
We report on results of a target of opportunity observation of the X-ray transient XTE J1118+480 performed on 2000 April 14-15 with the Narrow Field Instruments (0.1-200 keV) of th…
GRB000615 in X-rays
L. Nicastro, G. Cusumano, A. Antonelli +9
GRB000615 was detected simultaneously by the BeppoSAX GRBM and WFC 1 with a localization uncertainty of 2' (error circle radius). X-ray emission was detected only in the 0.1-4 keV…
On the absorption feature in the prompt X-ray spectrum of GRB 990705
D. Lazzati, G. Ghisellini, L. Amati +3
The absorption feature detected in the prompt X-ray emission of GRB 990705 bears important consequences. We investigate different production mechanisms and we conclude that the abs…
BeppoSAX measurements of the bright gamma-ray burst 010222
J. J. M. in 't Zand, L. Kuiper, L. Amati +14
We analyze the BeppoSAX measurements of the prompt and afterglow emission of the gamma-ray burst GRB010222. Among 45 GRBs detected with the Wide Field Cameras on BeppoSAX, the 40-7…
The prompt emission of GRB990712 with BeppoSAX: evidence of a transient X-ray emission feature
F. Frontera, L. Amati, M. Vietri +11
We report on the prompt X- and gamma-ray observations of GRB990712 with the BeppoSAX Gamma-Ray Burst Monitor and Wide Field Camera No. 2. Due to Sun constraints, we could not perfo…