GRB 160525C

T. Sakamoto, A. Yoshida, 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), M. L. Cherry (LSU), S. Ricciarini (U of Florence) 
P. S. Marrocchesi (U of Siena) and the CALET collaboration:

GRB 160525C (Konus-Wind trigger time on 10:54:28.0 UT) triggered the CALET Gamma-Ray 
Burst Monitor (CGBM) at 10:54:20.25 on 25 May 2016.  The burst signal was seen by all 
CGBM instruments.

The light curve of the SGM shows a double peak structure starting at T0+4 sec, peaking 
at T0+5 sec, and ending at T0+6.5 sec sec.  The T90 duration measured by the SGM data 
is 2.4 +- 0.3 sec (40-230 keV).  The light curve is available at

http://cgbm.calet.jp/cgbm_trigger/flight/1148208864/index.html

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

V. Bhalerao (IUCAA), V. Kumar (IUCAA), D. Bhattacharya (IUCAA), A. R. Rao (TIFR), S. Vadawale (PRL)  report on behalf of the Astrosat CZTI collaboration:

Analysis of Astrosat data showed the detection of GRB 160525C (Sakamoto
et al., GCN 19471
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 ; Konus Wind trigger time 10:54:28.0 UT) in CZTI data.
The source was clearly detected in the 40-240 keV energy range. The
light curve shows a complex structure, with the strongest peak at UT
10:54:23 and a peak count rate of 640 counts/sec above the background
(four quadrants summed together), with a total of 2796 counts. The local
mean background count rate of 86.2 is counts/sec. Using cumulative
rates, we measure a T90 of 5.1 sec.

CZTI GRB detections are reported regularly on the payload site at
http://astrosat.iucaa.in/czti/?q=node/9 . CZTI is built by a TIFR-led
consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC
and PRL. The Indian Space Research Organisation funded, managed and
facilitated the project.