{
  "subject": "GRB 250929A: Fermi GBM Final Real-time Localization",
  "submittedHow": "email",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "eventId": "GRB 250929A",
  "bibcode": "2025GCN.42028....1F",
  "createdOn": 1759176996484,
  "circularId": 42028,
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 20:06:07 UT on 29 Sep 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250929A (trigger 780869172.178268 / 250929838).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 58.2, Dec = -60.2 (J2000 degrees, equivalent to J2000 03h 52m, -60d 12'), with a statistical uncertainty of 11.5 degrees.\n\nThe angle from the Fermi LAT boresight is 73.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250929838/quicklook/glg_skymap_all_bn250929838.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250929838/quicklook/glg_healpix_all_bn250929838.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250929838/quicklook/glg_lc_medres34_bn250929838.gif\n"
}