{
  "bibcode": "2020GCN.27084....1Y",
  "body": "A. Yoshida, T. Sakamoto, V. Pal'shin, S. Sugita (AGU), \nY. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN),\nY. Asaoka, S. Torii (Waseda U), Y. Shimizu, \nT. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC), \nM. L. Cherry (LSU), S. Ricciarini (U of Florence),\nP. S. Marrocchesi (U of Siena),\nand the CALET collaboration:\n\nThe CALET Gamma-ray Burst Monitor (CGBM) was operating at the trigger \ntime of S200213t T0 = 2020-02-13 04:10:40.328 UT (The LIGO Scientific \nCollaboration and Virgo Collaboration, GCN Circ. 27042).\n\nNo CGBM on-board trigger occurred around the event time.  Based on the\nLVC high probability localization region, the summed LIGO probabilities\ninside the CGBM HXM (7 - 3000 keV) and SGM (40 keV - 28 MeV) fields\nof view are 2 % and 12 %, respectively (and 31 % credible region of the\nupdated localization map was above the horizon).  The HXM and SGM fields\nof view were centered at RA = 108.0 deg, Dec = -27.8 deg and \nRA = 101.3 deg, Dec = -36.1 deg at T0, respectively.\n\nBased on the analysis of the light curve data with 0.125 sec time \nresolution from T0-60 sec to T0+60 sec, we found no significant excess\n(signal-to-noise ratio >= 7) around the trigger time in either the HXM or\nthe SGM data.\n\nThe CALET Calorimeter (CAL) was operating in the high energy trigger\nmode at the trigger time of S200213t. Using the CAL data, we have\nsearched for gamma-ray events in the 10-100 GeV band from -60 sec\nto +60 sec from the GW trigger time and found no candidates. There \nwas no significant overlap with the LVC high probability localization \nregion at T0+-60 sec. The CAL FOV was centered at RA = 101.4 deg,\nDec = -36.1 deg at T0.",
  "circularId": 27084,
  "createdOn": 1581792404000,
  "email": "kawakubo1@lsu.edu",
  "subject": "LIGO/Virgo S200213t: No transient candidates in CALET observations",
  "submitter": "Yuta Kawakubo at Louisiana State U./CALET  <kawakubo1@lsu.edu>",
  "eventId": "LIGO/Virgo S200213t"
}