{
  "bibcode": "2025GCN.40355....1F",
  "createdOn": 1746498830816,
  "subject": "GRB 250506A: Fermi GBM Final Real-time Localization",
  "circularId": 40355,
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 02:23:22 UT on 6 May 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250506A (trigger 768191007.604196 / 250506100).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 219.9, Dec = 26.9 (J2000 degrees, equivalent to J2000 14h 39m, 26d 53'), with a statistical uncertainty of 2.1 degrees.\n\nThe angle from the Fermi LAT boresight is 107.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250506100/quicklook/glg_skymap_all_bn250506100.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/bn250506100/quicklook/glg_healpix_all_bn250506100.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250506100/quicklook/glg_lc_medres34_bn250506100.gif\n",
  "submittedHow": "email",
  "eventId": "GRB 250506A",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>"
}