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GCN Circular 20710

Subject
GRB 170219A: CALET Gamma-Ray Burst Monitor detection
Date
2017-02-21T09:29:37Z (7 years ago)
From
Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp>
M. L. Cherry (LSU), A. Yoshida, T. Sakamoto, Y. Kawakubo, M. Moriyama,
Y. Yamada (AGU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA), I. Takahashi (IPMU),
Y. Asaoka, S. Ozawa, S. Torii (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U),
W. Ishizaki (ICRR), S. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena)
and the CALET collaboration:

The short-duration GRB 170219A (Roberts et al., GCN Circ. 20706; Frederiks et al.,
GCN Circ. 20703; INTEGRAL-SPI/ACS trigger #7701) triggered the CALET Gamma-ray
Burst Monitor (CGBM) at 00:03:06.76 on 19 February 2017.  The burst signal was seen
by all CGBM instruments.  Because of a problem in one of the ground alert processing
script, the GCN notice was not distributed automatically for this event.

The light curve of the SGM shows a single peak.  The peak starts and peaks
at T0-0.2 sec and ends at T+0.5 sec.  The T90 duration measured by
the SGM data is 0.25 +- 0.18 sec (40-1000 keV).

The light curve is available at

http://cgbm.calet.jp/cgbm_trigger/flight/1171497500/index.html

The CALET data used in this analysis are provided by the Waseda
CALET Operation Center located at the Waseda University.
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