{
  "circularId": 40763,
  "format": "text/plain",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\n\"At 21:01:28.19 UT on 17 June 2025, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 250617B (trigger 771886893/250617876).\nIt is also detected by Swift-BAT/XRT (Page et al. 2025, GCN 40760)\n\nThe Fermi GBM on-ground location is consistent with the Swift-XRT position.\n\nThe angle from the Fermi LAT boresight is 91 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250617876/quicklook/glg_skymap_all_bn250617876.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/bn250617876/quicklook/glg_healpix_all_bn250617876.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250617876/quicklook/glg_lc_medres34_bn250617876.gif\"",
  "eventId": "GRB 250617B",
  "createdOn": 1750205666840,
  "submitter": "sumanbala2210@gmail.com",
  "bibcode": "2025GCN.40763....1F",
  "subject": "GRB 250617B: Fermi GBM Final Localization",
  "submittedHow": "web"
}