{
  "bibcode": "2017GCN.20936....1G",
  "body": "Adam Goldstein (USRA) and Colleen Wilson-Hodge (NASA/MSFC) report on behalf\nof the GBM-LIGO Group:\nLindy Blackburn (CfA), Michael S. Briggs (UAH), Jacob Broida (Carleton\nCollege), Eric Burns (UAH), Jordan Camp (NASA/GSFC), Tito Dal Canton\n(NASA/GSFC), Nelson Christensen (Carleton College), Valerie Connaughton\n(USRA), Rachel Hamburg (UAH), C. Michelle Hui (NASA/MSFC), Pete Jenke\n(UAH), Dan Kocevski (NASA/MSFC), Nicolas Leroy (LAL), Tyson Littenberg\n(NASA/MSFC), Julie McEnery (NASA/GSFC), Rob Preece (UAH), Judith Racusin\n(NASA/GSFC), Peter Shawhan (UMD), Karelle Siellez (GA Tech), Leo Singer\n(NASA/GSFC), John Veitch (Birmingham), Peter Veres (UAH)\n\nAt the time of G277583, Fermi was passing through the South Atlantic\nAnomaly, therefore the GBM detectors were disabled.\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\nLIGO sky map:\n\nEnergy       min  max  median\n--------------------------------\n 12- 27 keV: 0.07 0.56 0.10 Crab\n 27- 50 keV: 0.13 0.84 0.17 Crab\n 50-100 keV: 0.18 1.16 0.25 Crab\n100-300 keV: 0.34 1.98 0.46 Crab\n300-500 keV: 2.20 13.2 3.15 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": 20936,
  "createdOn": 1490387329000,
  "email": "adam.michael.goldstein@gmail.com",
  "subject": "LIGO/Virgo G277583: Fermi GBM Observations",
  "submitter": "Adam Goldstein at Fermi/GBM  <adam.michael.goldstein@gmail.com>",
  "eventId": "LIGO/Virgo G277583"
}