{
  "eventId": "GRB 250531A",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 18:02:24 UT on 31 May 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250531A (trigger 770407349.523472 / 250531752).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 170.8, Dec = 5.4 (J2000 degrees, equivalent to J2000 11h 23m, 5d 24'), with a statistical uncertainty of 6.4 degrees.\n\nThe angle from the Fermi LAT boresight is 37.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250531752/quicklook/glg_skymap_all_bn250531752.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/bn250531752/quicklook/glg_healpix_all_bn250531752.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250531752/quicklook/glg_lc_medres34_bn250531752.gif\n",
  "circularId": 40593,
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "bibcode": "2025GCN.40593....1F",
  "createdOn": 1748715172655,
  "subject": "GRB 250531A: Fermi GBM Final Real-time Localization",
  "submittedHow": "email"
}