{
  "bibcode": "2019GCN.26409....1W",
  "body": "C.A. Wilson-Hodge (NASA/MSFC) reports on behalf of the Fermi-GBM Team and the GBM-LIGO/Virgo group\r\n\r\nFor S191213g and using the initial bayestar.fits.gz skymap, Fermi-GBM was observing 99.9% of the localization probability at event time.\r\n\r\nThere was no Fermi-GBM onboard trigger around the event time of the LIGO/Virgo detection of GW trigger S191213g (GCN 26402). An automated, blind search for short gamma-ray bursts below the onboard triggering threshold in Fermi-GBM also identified no counterpart candidates. The GBM targeted search, the most sensitive, coherent search for GRB-like signals, was run from +/-30 s around merger time, and also identified no counterpart candidates.\r\n\r\nWe therefore set upper limits on impulsive gamma-ray emission. Using the representative soft, normal, and hard GRB-like templates described in arXiv:1612.02395, we set the following 3 sigma flux upper limits over 10-1000 keV, weighted by GW localization probability (in units of 10^-7 erg/s/cm^2):\r\n\r\nTimescale  soft     norm     hard\r\n--------------------------------------\r\n0.128 s:   5.4      8.9      14.\r\n1.024 s:   2.1      2.8      6.3\r\n8.192 s:   0.63     0.96     1.6\r\n\r\nAssuming the median luminosity distance of 194.9 Mpc from the GW detection, we estimate the following intrinsic luminosity upper limits over the 1 keV-10 MeV energy range (in units of 10^48 erg/s):\r\nTimescale  Soft     Normal   Hard\r\n------------------------------------\r\n0.128 s:     3.7      5.7     15.\r\n1.024 s:     1.5      1.8     6.7\r\n8.192 s:     0.44     0.62    1.7",
  "circularId": 26409,
  "createdOn": 1576245380000,
  "email": "colleen.wilson@nasa.gov",
  "subject": "LIGO/Virgo S191213g: Upper limits from Fermi-GBM Observations",
  "submitter": "Colleen A. Wilson at NASA/MSFC/NSSTC  <colleen.wilson@nasa.gov>",
  "eventId": "LIGO/Virgo S191213g"
}