{
  "bibcode": "2019GCN.24593....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. Ozawa, 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 high-voltage of the CALET Gamma-ray Burst Monitor (CGBM)\ndetectors were turned on around the  trigger time of S190517h, \nT0 = 2019-05-17 05:51:01.831 UT (The LIGO Scientific Collaboration\nand Virgo Collaboration, GCN Circ. 24570): at T0-8 sec, T0, and\nT0+8 sec for HXM1, HXM2, and SGM detector respectively. \n\nNo CGBM on-board trigger occurred around the event time.  Based \non the LIGO-Virgo localization sky map, the high probability area \nwas out of the FOV of the HXM detectors, and partially in the FOV\nof the SGM detector (the summed LIGO probabilities inside FOVs\nare 0% and 61% respectively), 11% credible region of the initial\nlocalization map  was Earth-occulted.  At T0, the HXM and SGM\nFOVs were centered at RA  = 117.0 deg, Dec = -25.4 deg and \nRA = 126.0 deg, Dec = -31.6 deg, respectively.\n\nBased on the analysis of the light curve data with 0.125 sec time \nresolution from T0-8 sec to T0+60 sec, we found no significant excess \n(signal-noise-ration >= 7) around the trigger time in either the HXM \n(7-3000 keV) or the SGM (40 keV - 28 MeV) data  (for the SGM, the \ninterval is from T0+8 sec to T0+60 sec).  Also, there is no sign of the\nweak excess reported by INTEGRAL SPI-ACS  at ~T0+37 s \n(Doyle et al., GCN Circ. 24571) in either the HXM or the SGM data.\n\nThe CALET Calorimeter (CAL) was operating in the high energy\ntrigger mode at the trigger time of S190517h. Using CAL data,\nwe have searched for gamma-ray events in the 10-100 GeV\nband from -60 sec to +60 sec from the GW trigger time and\nfound no candidates. There is no significant overlap with the LVC\nlocation probability map.  The CAL FOV was centered\nat RA=126.2 deg, Dec=-31.9 deg at T0.",
  "circularId": 24593,
  "createdOn": 1558242073000,
  "email": "kawakubo1@lsu.edu",
  "subject": "LIGO/Virgo S190517h: CALET Observations",
  "submitter": "Yuta Kawakubo at Louisiana State U./CALET  <kawakubo1@lsu.edu>",
  "eventId": "LIGO/Virgo S190517h"
}