{
  "bibcode": "2019GCN.24513....1P",
  "body": "S. Poolakkil (UAH) and C.M. Hui (NASA/MSFC) report on behalf of the\nFermi-GBM Team\nand the GBM-LIGO/Virgo group:\n\nFor S190512at, and using the updated BAYESTAR skymap, Fermi-GBM was\nobserving 34.7% of the localization probability at event time.\n\nThere was no Fermi-GBM onboard trigger around the event time of the\nLIGO/Virgo detection of GW trigger S190512at (GCN 24503). An automated,\nblind search for short gamma-ray bursts below the onboard triggering\nthreshold in Fermi-GBM also identified no counterpart candidates. The GBM\ntargeted search, the most sensitive, coherent search for GRB-like signals,\nwas run from +/-30 s around merger time, and also identified no counterpart\ncandidates.\n\nPart of the LVC localization region is behind the Earth for Fermi,\nlocated at RA = 308.1 and Dec = -3.6 with a radius of 67.2 degrees.\nWe therefore set upper limits on impulsive gamma-ray emission.  Using the\nrepresentative soft, normal, and hard GRB-like spectral templates described\nin arXiv:1612.02395, we set the following 3 sigma flux upper limits over\n10-1000 keV,\nweighted by the remaining visible GW localization probability (in units of\nerg/s/cm^2):\n\nTimescale  soft       norm       hard\n-----------------------------------------------\n0.128 s:   2.4e-07  4.3e-07  1.0e-06\n1.024 s:   5.3e-08  1.1e-07  2.5e-07\n8.192 s:   2.3e-08  2.3e-08  8.0e-08\n\nAssuming the median luminosity distance of ~1331 Mpc from the GW detection,\nwe\nestimate intrinsic luminosity upper limits of (0.8-7.9)E49 erg/s for the\nsoft template, (0.7-12.7)E49 erg/s for the normal template, and\n(3.9-49.3)E49 erg/s\nfor the hard template over the 1 keV-10 MeV energy range.",
  "circularId": 24513,
  "createdOn": 1557710399000,
  "email": "sp0076@uah.edu",
  "subject": "LIGO/Virgo S190512at: Fermi GBM Observations",
  "submitter": "Suraj Poolakkil at UAH  <sp0076@uah.edu>",
  "eventId": "LIGO/Virgo S190512at"
}