{
  "bibcode": "2019GCN.26622....1H",
  "body": "C. M. Hui (MSFC) reports on behalf of the Fermi-GBM team:\n\nFor the IceCube high-energy neutrino candidate event 191231A (GCN 26620), at the event time Fermi-GBM was observing the reported neutrino location at:\n\nRA: 46.36 (+4.27 -3.47 deg 90% PSF containment) J2000\nDec: 20.42 (+2.11 -2.80 deg 90% PSF containment) J2000\n\nThere was no Fermi-GBM onboard trigger around the event time of the neutrino candidate. 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 the neutrino candidate time. From this search, no significant signal was found related to IceCube-191231A.\n\nWe 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 (in units of 10^-7 erg/s/cm^2):\n\nTimescale�� Soft �� �� Normal �� Hard\n-------------------------------------------\n0.128 s:�� �� �� 6.5 �� �� 10.�� �� �� 19.��\n1.024 s:�� �� �� 1.7�� �� �� 2.6�� �� �� 4.5��\n8.192 s:�� �� �� 0.3�� �� �� 0.6�� �� �� 1.4��",
  "circularId": 26622,
  "createdOn": 1577833500000,
  "email": "c.m.hui@nasa.gov",
  "subject": "IceCube-191231A: Upper limits from Fermi-GBM Observations",
  "submitter": "C. Michelle Hui at MSFC/Fermi-GBM  <c.m.hui@nasa.gov>",
  "eventId": "IceCube-191231A"
}