{
  "eventId": "GRB 250228A",
  "circularId": 39547,
  "createdOn": 1740908611669,
  "format": "text/plain",
  "submittedHow": "web",
  "bibcode": "2025GCN.39547....1F",
  "body": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\n\"At 07:23:46.16 UT on 28 February 2025, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 250228A (trigger 762420231/250228308).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 94.90, Dec = -46.81 (J2000 degrees, equivalent to J2000 6h 19m, -46d 48'),\nwith a statistical uncertainty of 11.91 degrees.\n\nThe angle from the Fermi LAT boresight is 27 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250228308/quicklook/glg_skymap_all_bn250228308.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/bn250228308/quicklook/glg_healpix_all_bn250228308.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250228308/quicklook/glg_lc_medres34_bn250228308.gif\"",
  "submitter": "Marianna Dafčíková at Masaryk University <500025@mail.muni.cz>",
  "subject": "GRB 250228A: Fermi GBM Final Localization"
}