{
  "bibcode": "2017GCN.21810....1H",
  "body": "LIGO/Virgo G298389: Fermi GBM Flux Upper Limits\n\nR. Hamburg (UAH) and C. Wilson-Hodge (NASA/MSFC) report on behalf of\nthe GBM-LIGO\nGroup:\nL. Blackburn (CfA), M. S. Briggs (UAH), J. Broida (Carleton College), E.\nBurns (NASA/GSFC), J. Camp (NASA/GSFC), T. Dal Canton (NASA/GSFC), N.\nChristensen (Carleton College), V. Connaughton (USRA), A. Goldstein (USRA),\nC. M. Hui (NASA/MSFC), P. Jenke (UAH), D. Kocevski (NASA/MSFC), N. Leroy\n(LAL), T. Littenberg (NASA/MSFC), J. McEnery (NASA/GSFC), R. Preece (UAH),\nJ. Racusin (NASA/GSFC), P. Shawhan (UMD), K. Siellez (GA Tech), L. Singer\n(NASA/GSFC), J. Veitch (Birmingham), P. Veres (UAH)\n\nAt the time of the LIGO/VIRGO candidate G298389, Fermi was passing through\nthe South Atlantic Anomaly, and the GBM detectors were disabled. We set the\nfollowing flux upper limits for the visible sky map within the 90% credible\nregion.\n\nUsing the Earth Occultation technique (Wilson-Hodge et al. 2012, ApJS, 201,\n33) to estimate the amount of persistent emission during a 48-hour period\ncentered on the LIGO trigger time, we place the following range of 3-sigma\nday-averaged flux upper limits based on observed sources over the entire\n90% credible region of the LIGO sky map:\n\n   Energy   min  max  median\n    -----------------------------------\n  12-27 keV:  0.09 0.22 0.14  Crab\n  27-50 keV:  0.15 0.37 0.23  Crab\n 50-100 keV:  0.22 0.55 0.33  Crab\n100-300 keV:  0.39 1.02 0.60  Crab\n300-500 keV:  2.69 7.59 4.20  Crab\n\nThese limits are based on the minimum requirement that each source in the\nEarth Occultation catalog was Earth-occulted at least 6 times in each of\nthe 24 hour periods preceding and following the LIGO trigger and that the\noccultations were well separated from nearby bright sources.",
  "circularId": 21810,
  "createdOn": 1504539166000,
  "email": "rkh0007@uah.edu",
  "subject": "LIGO/Virgo G298389: Fermi GBM Flux Upper Limits",
  "submitter": "Rachel Hamburg at UAH  <rkh0007@uah.edu>",
  "eventId": "LIGO/Virgo G298389"
}