{
  "bibcode": "2020GCN.27231....1K",
  "body": "Y. Kawakubo (LSU), A. Yoshida, T. Sakamoto, V. Pal'shin,\nS. Sugita (AGU), 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\nAt the trigger time of the compact binary merger candidate \nS200224ca T0 = 2020-02-24 22:22:34.406 UT (The LIGO \nScientific Collaboration and Virgo Collaboration, GCN \nCirc. 27184), the CALET Gamma-ray Burst Monitor (CGBM)\nhigh voltages were off (from T0-18 min to T0+1 min).\n\nThe CALET Calorimeter (CAL) was operating in the high \nenergy trigger mode at the trigger time of S200224ca. Using\nthe CAL data, we have searched for gamma-ray events in the\n10-100 GeV band from -60 sec to +60 sec from the GW trigger \ntime and found no candidates in the overwrap region with the\nLIGO-Virgo high probability localization region.  The 90% \nupper limit of CAL is 5.0 x 10^-7 erg/cm^2/s (10-100 GeV) \nwhen the summed LIGO-Virgo probability reaches 95%. The CAL \nFOV was centered at RA = 167.5 deg, DEC = -24.8 deg at T0.",
  "circularId": 27231,
  "createdOn": 1582782804000,
  "email": "kawakubo1@lsu.edu",
  "subject": "LIGO/Virgo S200224ca: Upper limits from CALET observations.",
  "submitter": "Yuta Kawakubo at Louisiana State U./CALET  <kawakubo1@lsu.edu>",
  "eventId": "LIGO/Virgo S200224ca"
}