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GRB 090313: X-shooter's first shot at a GRB
A. de Ugarte Postigo, P. Goldoni, C. C. Thöne +26
Context. X-shooter is the first second-generation instrument to become operative at the ESO Very Large Telescope (VLT). It is a broad-band medium-resolution spectrograph designed w…
GRB090426: the farthest short gamma-ray burst?
L. A. Antonelli, P. D Avanzo, R. Perna +23
Aims. With an observed and rest-frame duration of < 2s and < 0.5s, respectively, GRB090426 could be classified as a short GRB. The prompt detection, both from space and ground-base…
Testing GRB models with the afterglow of GRB 090102
B. Gendre, A. Klotz, E. Palazzi +9
We present the observations of the afterglow of gamma-ray burst GRB 090102. Optical data taken by the TAROT, REM, GROND, together with publicly available data from Palomar, IAC and…
GRB090111: extra soft steep decay emission and peculiar re-brightening
R. Margutti, T. Sakamoto, G. Chincarini +8
We present a detailed study of GRB090111, focusing on its extra soft power-law photon index Gamma>5 at the very steep decay phase emission (power-law index alpha=5.1, steeper than…
Detailed Radio to Soft Gamma-ray Studies of the 2005 Outburst of the New X-ray Transient XTE J1818-245
M. Cadolle Bel, L. Prat, J. Rodriguez +11
XTE J1818-245 is an X-ray nova that experienced an outburst in 2005, first seen by the RXTE satellite. The source was observed simultaneously at various wavelengths up to soft gamm…
Rise and fall of the X-ray flash 080330: an off-axis jet?
C. Guidorzi, C. Clemens, S. Kobayashi +31
X-ray flashes (XRFs) are a class of gamma-ray bursts (GRBs) with the peak energy of the time-integrated spectrum, Ep, below 30 keV, whereas classical GRBs have Ep of a few hundreds…