1.5k citations · 15.4k across the 209 of their papers we have counts for
14 papers · 2 filters
Discovery of a Transient Absorption Edge in the X-ray Spectrum of GRB 990705
L. Amati, F. Frontera, M. Vietri +18
We report the discovery of a transient equivalent hydrogen column density with an absorption edge at ~3.8 kiloelectron volts in the spectrum of the prompt x-ray emission of gamma-r…
BeppoSAX confirmation of beamed afterglow emission from GRB990510
Elena Pian, Paolo Soffitta, Alessandro Alessi +8
We compare the prompt X-ray (2-10 keV) emission of GRB990510 measured by the BeppoSAX Wide Field Cameras (WFC) during the burst to the X-ray afterglow detected by the BeppoSAX Narr…
VLT identification of the optical afterglow of the gamma-ray burst GRB 000131 at z=4.50
M. I. Andersen, J. Hjorth, H. Pedersen +16
We report the discovery of the gamma-ray burst GRB 000131 and its optical afterglow. The optical identification was made with the VLT 84 hours after the burst following a BATSE det…
Broad band spectrum of Cygnus X-1 in two spectral states with BeppoSAX
F. Frontera, E. Palazzi, A. A. Zdziarski +13
We report on the 0.5--200 keV spectral properties of Cyg X-1 observed at different epochs with the Narrow Field Instruments of the BeppoSAX satellite. The source was in its soft st…
Multiband optical polarimetry of the BL Lac object PKS 2155--304. Intranight and long term variability
Leonardo Tommasi, Ruben Diaz, Eliana Palazzi +4
The polarized and total flux of the BL Lac object PKS 2155-304 were monitored intensively and simultaneously in the optical UBVRI bands with the Turin photopolarimeter at the CASLE…
Hard X-rays from Type II bursts of the Rapid Burster and its transition toward quiescence
N. Masetti, F. Frontera, L. Stella +10
We report on 4 BeppoSAX Target Of Opportunity observations of MXB 1730-335, the Rapid Burster (RB), made during the 1998 February-March outburst. In the first observation, approxim…
The very red afterglow of GRB 000418 - further evidence for dust extinction in a GRB host galaxy
S. Klose, B. Stecklum, N. Masetti +36
We report near-infrared and optical follow-up observations of the afterglow of the Gamma-Ray Burst 000418 starting 2.5 days after the occurrence of the burst and extending over nea…
Discovery of hard X-ray emission from Type II bursts of the Rapid Burster
F. Frontera, N. Masetti, M. Orlandini +9
We report on results of BeppoSAX Target Of Opportunity (TOO) observations of the source MXB 1730-335, also called the Rapid Burster (RB), made during its outburst of February-March…
The jet and circumburst stellar wind of GRB 980519
A. O. Jaunsen, J. Hjorth, G. Bjornsson +6
We present extensive multi-colour (UBVR_CI_C) photometry of the optical afterglow of GRB 980519. Upon discovery, 8.3 hours after the burst, the source was decaying as a power law,…
BeppoSAX Observations of Markarian 501 in June 1999
E. Pian, L. Chiappetti, P. Giommi +19
We present the preliminary results of a long BeppoSAX observation of the BL Lac object Mkn501 carried out in June 1999. The source was fainter than found during the BeppoSAX pointi…
ISO detection of a 60micron source near GRB970508
L. Hanlon, R. J. Laureijs, L. Metcalfe +18
The Infrared Space Observatory observed the field of the --ray burst GRB 970508 with the CAM and PHT instruments on May 21 and 24, 1997 and with PHT in three filters in November…
ASCA and BeppoSAX observations of the peculiar X-ray source 4U1700+24/HD154791
D. Dal Fiume, N. Masetti, C. Bartolini +9
The X-ray source 4U1700+24/HD154791 is one of the few galactic sources whose counterpart is an evolved M star. In X-rays the source shows extreme erratic variability and a complex…
Cyclotron lines in X-ray pulsars as a probe of relativistic plasmas in superstrong magnetic fields
D. Dal Fiume, Filippo Frontera, Nicola Masetti +7
The systematic search for the presence of cyclotron lines in the spectra of accreting X-ray pulsars is being carried on with the BeppoSAX satellite since the beginning of the missi…
BeppoSAX spectrum of GRB971214: evidence of a substantial energy output during afterglow
D. Dal Fiume, L. Amati, L. A. Antonelli +18
We report the X/gamma-ray spectrum of GRB971214 and of its afterglow. The afterglow was measured few hours after the main event and for an elapsed time of more than two days. The m…