[vsnet-grb-info 17806] GRB 160324A: CALET Gamma-Ray Burst Monitor detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Wed Mar 30 08:44:15 JST 2016
TITLE: GCN CIRCULAR
NUMBER: 19248
SUBJECT: GRB 160324A: CALET Gamma-Ray Burst Monitor detection
DATE: 16/03/29 23:43:36 GMT
FROM: Takanori Sakamoto at AGU <tsakamoto at phys.aoyama.ac.jp>
T. Tamura (Kanagawa U), A. Yoshida, T. Sakamoto, I. Takahashi, Y. Kawakubo,
K. Senuma, M. Moriyama, Y. Yamada (AGU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA),
Y. Asaoka, S. Ozawa, S. Torii (Waseda U), Y. Shimizu (Kanagawa U), W. Ishizaki (ICRR),
M. L. Cherry (LSU), S. Ricciarini (U of Florence) P. S. Marrocchesi (U of Siena)
and the CALET collaboration:
The long-duration GRB 160324A (INTEGRAL-ACS trigger #7431; Konus-Wind trigger time on
15:58:32.877 UT) triggered the CALET Gamma-Ray Burst Monitor (CGBM) at 15:58:38.0 on
24 March 2016. No real time CGBM GCN notice was distributed about this trigger because
the real time communication from the ISS was off (loss of signal) between 15:51 and 16:13.
The burst signal was seen by SGM instrument.
The light curve of the SGM shows at least two main episodes with a possible low level
emission before the first episode. The low-level emission starts at T0-30 sec. The
first episode starts at T0-5 sec, peaks at T0-3 sec and ends at T0+5 sec. The second
episode starts at T0+6 sec, peaks at T0+8sec and ends at T0+14 sec. The T90 duration
measured by the SGM data is 42 +- 2 sec (40-450 keV).
The CGBM data used in this analysis are provided by the Waseda CALET Operation Center
located at the Waseda University.
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