{
  "body": "LIGO/VIRGO G299232: Fermi GBM Observations\n\nR. Hamburg (UAH) reports on behalf of the GBM-LIGO Group:\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 (GATech), L. Singer\n(NASA/GSFC), J. Veitch (Birmingham), P. Veres (UAH), C. Wilson-Hodge\n(NASA/MSFC)\n\nAt the G299232 event time (2017-08-25 13:13:37 UTC), Fermi GBM was taking\ndata and viewing the entire un-occulted sky approximately 67 degrees from\nEarth center (RA = 54.6,Dec = 7.8), which includes 36% of the LIGO BAYESTAR\nHLV map.\n\nNo on-board triggers occurred within an hour of the GW trigger time.\nThe untargeted ground-based search of GBM data for short-duration GRBs\n(Briggs et al., in prep) also did not find any significant candidate within\none hour of the GW trigger.\n\nThe targeted search of the GBM data ([1],[2]) searched +/- 30 s around the\nGW event time, processing time scales of 0.256 to 8.192 s. One event with a\nsoft spectrum was found on a 4 s timescale approximately 27 s after the GW\ntime. The initial estimated False Alarm Rate (FAR) is 4.6e-4 Hz (90%\nconfidence). The localization returned by the search does not overlap with\nthe LHV Bayestar localization region. We conclude that this signal is\nunassociated with the GW event.\n\nThe targeted search was also run +/- 30 s around the gamma-ray candidate\nreported by AGILE MCAL (Carrillo et al., 2017, GCN 21700). No significant\ncandidates were found.\n\n[1] L. Blackburn et al. 2015, ApJS 217, 8\n[2] A. Goldstein et al. arXiv:1612.02395",
  "editedOn": 1777052875132,
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov>",
  "email": "rkh0007@uah.edu",
  "eventId": "LIGO/Virgo G299232",
  "subject": "LIGO/VIRGO G299232: Fermi GBM Observations",
  "version": 2,
  "circularId": 21711,
  "bibcode": "2017GCN.21711....1H",
  "createdOn": 1503717081000,
  "submitter": "Rachel Hamburg at UAH  <rkh0007@uah.edu>"
}