{
  "bibcode": "2017GCN.20568....1M",
  "body": "R. Marcinkowski (PSI), H.L. Xiao (PSI) and W. Hajdas (PSI) report on behalf \nof the POLAR collaboration:\n\nAt 2017-01-30 07:14:45 UT(T0), during a routine on-ground search of data, \nPOLAR detected GRB 170130A, which was also observed by Fermi GBM \n(trigger # 507453289). Significant detection was recorded in 9 of 25 POLAR \nmodules.\n\nThe POLAR light curve consists of multi peak structure with duration (T90) \nof 35.0 +/- 1.0 s measured from T0 and is compatible with Fermi GBM light curve. \nThe 1.0 s peak flux at T0 + 30.5 s is equal to 480 +/- 80 counts/sec. POLAR \nrecorded about 5300 events from the burst.\n\nAbove measurements are in the energy range of about 20 - 500 keV and bases \non data from 9 modules.\n\nLC_URL: http://polar.psi.ch/triggers/GRB_170130A_raw_9of25.png\n     or http://polar.psi.ch/pub/lc.php?event=GRB+170130A\n\nUsing the best location from Fermi GBM, which is (J2000):\nRA : 271.1 [deg]\nDec: -29.1 [deg]\nErr:   5.5 [deg]\n\nthe incident angle in the POLAR coordinate at T0 is:\nTheta: 56.2 [deg]\nPhi:  230.9 [deg]\n\nThe analysis results presented above are preliminary. Calibration of the \ninstrument is ongoing. POLAR is a dedicated Gamma-Ray Burst polarimeter \nwhich was launched on-board the Chinese space laboratory Tiangong-2 (TG-2) \non Sep 15, 2016. The energy detection range of POLAR is ~ 50-500 keV.\nMore information about POLAR can be found at http://polar.psi.ch/pub , \nhttp://polar.ihep.ac.cn/en/ and http://isdc.unige.ch/polar/ .\n\nThis message is quotable in publications.",
  "circularId": 20568,
  "createdOn": 1485938600000,
  "email": "radoslaw.marcinkowski@psi.ch",
  "subject": "GRB 170130A: POLAR Observation",
  "submitter": "Radek Marcinkowski at PSI/POLAR  <radoslaw.marcinkowski@psi.ch>",
  "eventId": "GRB 170130A"
}