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The afterglow onset for GRB060418 and GRB060607A
S. Covino, S. D. Vergani, D. Malesani +32
Gamma-ray burst are thought to be produced by highly relativistic outflows. Although upper and lower limits for the outflow initial Lorentz factor are available, observationa…
The GRB afterglow onset observed by REM: fireball Lorentz factor and afterglow fluence
Daniele Malesani, Emilio Molinari, Susanna Vergani +1
We report observations of the early light curves of GRB 060418 and GRB 060607A, carried out with the pink robotic telescope REM. A clear peak is detected for both events, which is…
Simultaneous Swift and REM monitoring of the blazar PKS0537-441 in 2005
E. Pian, P. Romano, A. Treves +24
The blazar PKS0537-441 has been observed by Swift between the end of 2004 and November 2005. The BAT monitored it recurrently for a total of 2.7 Ms, and the XRT and UVOT pointed it…
REM near-IR and optical multiband observations of PKS2155-304 in 2005
A. Dolcini, F. Farfanelli, S. Ciprini +23
Spectral variability is the main tool for constraining emission models of BL Lac objects. By means of systematic observations of the BL Lac prototype PKS 2155-304 in the infrared-o…