GCN Circular 23701
Subject
MAGIC detects the GRB 190114C in the TeV energy domain
Date
2019-01-15T01:56:36Z (5 years ago)
From
Razmik Mirzoyan at MPI/MAGIC <Razmik.Mirzoyan@mpp.mpg.de>
R. Mirzoyan (MPP Munich), K. Noda (ICRR University of Tokyo),
E. Moretti (IFAE Barcelona), A. Berti (University and INFN Torino),
C. Nigro (DESY Zeuthen), J. Hoang (UCM Madrid), S. Micanovic
(University of Rijeka), M. Takahashi (ICRR University of Tokyo),
Y. Chai (MPP Munich), A. Moralejo (IFAE Barcelona) and the MAGIC
Collaboration report:
On January 14, 2019, the MAGIC telescopes located at the Observatorio
Roque de los Muchachos on the Canary island of La Palma, detected
very-high-energy gamma-ray emission from GRB 190114C (Gropp et al.,
GCN 23688; Tyurina et al., GCN 23690, de Ugarte Postigo et al., GCN
23692, Lipunov et al. GCN 23693, J. Selsing et al. GCN 23695).
The observation was triggered by the Swift-BAT alert and it started about
50s after the Swift T0: 20:57:03.19.
The GRB data of MAGIC shows a clear excess of gamma-ray events with the
significance >20 sigma in the first 20 min (starting at T0+50s) for energies
>300GeV. The relatively high detection threshold is due to the large zenith
angle of observations (~60 deg.) and the presence of partial moon. After
the first bright flash the source is quickly fading.
The MAGIC point of contact for this burst is R. Mirzoyan
(Razmik.Mirzoyan@mpp.mpg.de).
Burst Advocate for this burst is K. Noda ( <mailto:nodak@icrr.u-tokyo.ac.jp>
nodak@icrr.u-tokyo.ac.jp)