[vsnet-grb-info 18821] GRB 161210A: POLAR observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  20271
SUBJECT: GRB 161210A: POLAR observation
DATE:    16/12/16 06:21:33 GMT
FROM:    Zhengheng Li at POLAR  <lizhengheng at ihep.ac.cn>

Z. H. Li (IHEP), Y. H. Wang (IHEP), Y. Zhao (IHEP), M. Z. Feng(IHEP),
J. C. Sun (IHEP), H. C. Li (IHEP), S. L. Xiong (IHEP), T. Batsch(NCBJ),
T. Bernasconi (ISDC/UniGe), F. Cadoux (DPNC/UniGe), Y. W. Dong (IHEP),
M. Y. Ge (IHEP),W.Hajdas (PSI),Y. Huang (IHEP), Karol Jedrzejczak (NCBJ),
M. R. Kole (DPNC/UniGe), F. J. Lu (IHEP), R. Marcinkowski(PSI), 
M. Pohl (DPNC/UniGe), N. Produit (ISDC/UniGe),A. Rutczynska (NCBJ),
D. Rybka (NCBJ),L. M. Song (IHEP), J. Szabelski (NCBJ), X. Wen (IHEP),
 B. B. Wu (IHEP),X. Wu (DPNC/UniGe), H. L. Xiao (PSI), M. Xu (IHEP),
J. Zhang (IHEP),L. Y. Zhang (IHEP), P. Zhang (PSI), S. N. Zhang (IHEP),
Y. J. Zhang (IHEP), A. Zwolinska (NCBJ)
report for the POLAR collaboration:

At 2016-12-10T12:33:54 UT (T0), during a routine on-ground 
search of data, POLAR detected the GRB 161210A, 
which was also detected by the Fermi/GBM (trigger 503066038/161210523).

The POLAR light curve consists of a single peak,
with a duration (T90) of 11.76 s measured from T0-0.10 s .
The 1s peak rate measured from T0+0.00 s is 199.3 cnts/s,
The total counts is about 1318 cnts.  The above measurements are
in the energy range of about 80-500 keV.

LC_URL:
http://polar.ihep.ac.cn/grb/2016/GRB161210A/lc/POLAR_lc_grb161210523.jpg

Using the best location from the Fermi/GBM, which is (J2000):
RA:      283.120   [deg]
Dec:     +63.050   [deg]
Err:     10.11     [deg]

the incident angle in POLAR coordinate at T0 is:
theta:  75.9  [deg]
phi:   -23.6  [deg]

The analysis results presented above are preliminary.

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/