{
  "subject": "GRB 250816A: Fermi GBM Final Real-time Localization",
  "circularId": 41397,
  "eventId": "GRB 250816A",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "body": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\nAt 01:30:10 UT on 16 Aug 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250816A (trigger 777000615.453666 / 250816063).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 156.7, Dec = 58.9 (J2000 degrees, equivalent to J2000 10h 26m, 58d 53'), with a statistical uncertainty of 3.0 degrees.\n\nThe angle from the Fermi LAT boresight is 40.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250816063/quicklook/glg_skymap_all_bn250816063.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/bn250816063/quicklook/glg_healpix_all_bn250816063.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250816063/quicklook/glg_lc_medres34_bn250816063.gif\n",
  "createdOn": 1755308445958,
  "submittedHow": "email",
  "bibcode": "2025GCN.41397....1F"
}