{
  "bibcode": "2017GCN.21506....1C",
  "body": "V. Connaughton (USRA) reports on behalf of the GBM-LIGO Group:\n\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), A. Goldstein (USRA), R. Hamburg (UAH), C.\nM. 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), and C. Wilson-Hodge \n(NASA/MSFC)\n\nThe on-board trigger time of Fermi GBM trigger 170817.529 524666471 \nat 12:41:06.47 UT is approximately 2 seconds after the single interferometer\nLIGO trigger reported in GCN 21505.\n\nInspection of the real-time data suggests the trigger is consistent with a\nweak short GRB, location RA, Dec = 176.8, -39.8 deg (J2000).  The\nstatistical uncertainty on this location is 11.6 deg \n(radius, 1-sigma containment,\nstatistical only; there is additionally a systematic\nerror which we have characterized as a core-plus-tail model, with 90% of\nGRBs having a 3.7 deg error and a small tail suffering a larger than 10 deg\nsystematic error. [Connaughton et al. 2015, ApJS, 216, 32] )\n\nThe GBM localization sky map for this event is available at the Fermi Science Support Center \nand shows the uncertainty region including the systematic component:\n\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170817529/quicklook/glg_locplot_all_bn170817529.png <https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170817529/quicklook/glg_locplot_all_bn170817529.png>\n\nand as a FITS file:\n\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170817529/quicklook/glg_locprob_all_bn170817529.fit <https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170817529/quicklook/glg_locprob_all_bn170817529.fit> \n\nWe are producing a HEALPIX map for dissemination to the lv-em observers which should be available very shortly\nand will report further analysis of this event when the science data are downlinked from the spacecraft, on a time-scale\nof hours.\n\n[GCN OPS NOTE(17aug17): Per author's request, the LIGO/VIRGO ID\nwas added to the beginning of the Subject-line.]",
  "circularId": 21506,
  "createdOn": 1502977657000,
  "email": "valerie@nasa.gov",
  "subject": "LIGO/Virgo G298048: Fermi GBM trigger 170817.529 and LIGO single IFO trigger",
  "submitter": "Valerie Connaughton at USRA  <valerie@nasa.gov>",
  "eventId": "LIGO/Virgo G298048"
}