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High energy variability of 3C 273 during the AGILE multiwavelength campaign of December 2007 - January 2008
L. Pacciani, I. Donnarumma, V. Vittorini +52
We report the results of a 3-weeks multi-wavelength campaign on the flat spectrum radio quasar 3C 273 carried out with the AGILE gamma-ray mission, covering the 30 MeV -50 GeV and…
Gamma-ray burst detection with the AGILE mini-calorimeter
M. Marisaldi, C. Labanti, F. Fuschino +70
The Mini-Calorimeter (MCAL) instrument on-board the AGILE satellite is a non-imaging gamma-ray scintillation detector sensitive in the 300keV-100MeV energy range with a total on-ax…
The dark burst 010214 with BeppoSAX: possible variable absorption and jet X-ray emission
C. Guidorzi, F. Frontera, E. Montanari +12
We report on the prompt and afterglow emission observations of the dark burst GRB010214 with BeppoSAX. The prompt emission shows possible evidence of variable absorption from N_H =…
The BeppoSAX view of the X-ray active nucleus of NGC4258
F. Fiore, S. Pellegrini, G. Matt +9
BeppoSAX observed NGC4258 on December 1998, when its 2-10 keV luminosity was \~1E41 erg/s. 100% variability is observed in the 3-10 keV band on timescales of a half a day while 20%…
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…