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REM observations of GRB 060418 and GRB 060607A: the onset of the afterglow and the initial fireball Lorentz factor determination
E. Molinari, S. D. Vergani, D. Malesani +32
Gamma-ray burst (GRB) emission is believed to originate in highly relativistic fireballs. Currently, only lower limits were securely set to the initial fireball Lorentz factor Gamm…
The host galaxy of GRB 011121: Morphology and Spectral Energy Distribution
Aybuke Kupcu Yoldas, Mara Salvato, Jochen Greiner +3
(Abridged) We present a detailed study of the host galaxy of GRB 011121 (at z = 0.36) based on high-resolution imaging in 5 broad-band, optical and near-infrared filters with HST a…
Optical observations of GRB 060218/SN 2006aj and its host galaxy
Patrizia Ferrero, Eliana Palazzi, Elena Pian +1
The supernova SN 2006aj associated with GRB 060218 is the second-closest GRB-SN observed to date (=0.033) and is the clearest example of a SN associated with a Swift GRB with th…
Constraints on an optical afterglow and on supernova light following the short burst GRB 050813
P. Ferrero, S. F. Sanchez, D. A. Kann +18
We report early follow-up observations of the error box of the short burst 050813 using the telescopes at Calar Alto and at Observatorio Sierra Nevada (OSN), followed by deep VLT/F…
The GRB 060218/SN 2006aj event in the context of other Gamma-Ray Burst Supernovae
P. Ferrero, D. A. Kann, A. Zeh +15
The supernova SN 2006aj associated with GRB 060218 is the second-closest GRB-SN observed to date (z=0.033). We present Very Large Telescope, Liverpool Telescope, and Katzman Automa…
Physics of the GRB 030328 afterglow and its environment
E. Maiorano, N. Masetti, E. Palazzi +30
We report on the photometric, spectroscopic and polarimetric, monitoring of the optical afterglow of Gamma-Ray Burst (GRB) 030328 detected by HETE-2. Photometry, collected at 7 dif…