[vsnet-grb-info 18860] GRB 161217C: POLAR observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  20311
SUBJECT: GRB 161217C: POLAR observation
DATE:    16/12/21 01:26:37 GMT
FROM:    Yuanhao Wang at IHEP/CAS  <wangyuanhao at ihep.ac.cn>

Y. H. Wang (IHEP/CAS), S. L. Xiong(IHEP/CAS)
report for the POLAR collaboration:

At 2016-12-17T03:53:15 UT (T0), during a routine on-ground 
search of data, POLAR detected the GRB 161217C, 
which was also detected by the IPN-KW.

The POLAR light curve consists of two peaks,
with a duration (T90) of 6.409 s measured from T0-2.8525 s.
The 0.5s peak rate measured from T0+3.0s is 1733 cnts/s,
The total counts is about 4364 cnts.  The above measurements are
in the energy range of about 80-500 keV.

LC_URL:
http://polar.ihep.ac.cn/grb/2016/GRB161217C/lc/POLAR_lc_grb161217161.png

All the analysis results presented above are preliminary.
Calibration of the instrument is ongoing.

POLAR is a dedicated Gamma-Ray Burst polarimeter (50-500 keV) on-board 
the Chinese space laboratory Tiangong-2 launched on Sep 15, 2016. More 
information about POLAR can be found at http://polar.ihep.ac.cn/en/ , 
http://isdc.unige.ch/polar/ and http://polar.psi.ch/html/ .