Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-02-10
Astrophys.J.641:L9-L12,2006
Astronomy and Astrophysics
Astrophysics
14 pages, 4 figures, submitted to ApJ
Scientific paper
10.1086/503767
The long-duration GRB050713a was observed by the MAGIC Telescope, 40 seconds after the burst onset, and followed up for 37 minutes, until twilight. The observation, triggered by a SWIFT alert, covered energies above ~175 GeV. Using standard MAGIC analysis, no evidence for a gamma signal was found. As the redshift of the GRB was not measured directly, the flux upper limit, estimated by MAGIC, is still compatible with the assumption of an unbroken power-law spectrum extending from a few hundred keV to our energy range.
Albert Jacques
Aliu Ester
Anderhub H.
Angelis Alessando de
Antoranz P.
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