{
  "bibcode": "2017GCN.21706....1A",
  "body": "Y. Asaoka (Waseda U), A. Yoshida, T. Sakamoto, Y. Kawakubo, M. Moriyama,\nY. Yamada, A. Tezuka, S. Matsukawa (AGU), K. Yamaoka (Nagoya U),\nS. Nakahira (RIKEN), I. Takahashi (IPMU), S. Ozawa, S. Torii (Waseda U),\nY. Shimizu, T. Tamura (Kanagawa U), W. Ishizaki (ICRR), M. L. Cherry (LSU),\nS. Ricciarini (U of Florence), A. V. Penacchioni, P. S. Marrocchesi (U of Siena)\nand the CALET collaboration:\n\nThe CALET Gamma-ray Burst Monitor (CGBM) was operating at the trigger time\nof G298936 (The LIGO Scientific Collaboration and Virgo Collaboration,\nGCN Circ. 21656).  No CGBM on-board trigger occurred at the time\nof the event.  Based on the LIGO-Virgo localization sky map (bayestar-HLV.fits.gz),\nthe part of the northern arc of the high probability area was in the field-of-view of\nCGBM.  The summed LIGO probabilities inside the HXM and the SGM field of view\nare 57% and 66%.\n\nBased on the analysis of the light curve data with 0.125 sec time resolution\nfrom -60 sec to 60 sec from the trigger time, we found no significant excess\naround the trigger time in either the HXM (7-3000 keV) or the SGM (40 keV -28 MeV)\ndata.\n\nThe CALET Calorimeter (CAL) was operating in high energy trigger mode at the trigger\ntime of G298936.  Similar to CGBM, the northern arc of the high probability area of the\nLIGO-Virgo localization map was in the field of view of CAL.  Using CAL data, we have\nsearched for gamma-ray events in the 10-100 GeV band from -60 sec to +60 sec from\nthe GW trigger time and found no candidates.  The 90% upper limit of CAL is\n2e-5 erg/cm2/s (10-100 GeV) when the summed LIGO-Virgo probabilities reaches at 20%.",
  "circularId": 21706,
  "createdOn": 1503706099000,
  "email": "tsakamoto@phys.aoyama.ac.jp",
  "subject": "LIGO/Virgo G298936: CALET Observations",
  "submitter": "Takanori Sakamoto at Aoyama Gakuin U  <tsakamoto@phys.aoyama.ac.jp>",
  "eventId": "LIGO/Virgo G298936"
}