{
  "circularId": 33700,
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "eventId": "GRB 230428A",
  "subject": "GRB 230428A: Fermi GBM Final Real-time Localization",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 09:08:58 UT on 28 Apr 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230428A (trigger 704365743.150826 / 230428381).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 121.8, Dec = -86.1 (J2000 degrees, equivalent to J2000 08h 07m, -86d 05'), with a statistical uncertainty of 15.9 degrees.\n\nThe angle from the Fermi LAT boresight is 30.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230428381/quicklook/glg_skymap_all_bn230428381.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/2023/bn230428381/quicklook/glg_healpix_all_bn230428381.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230428381/quicklook/glg_lc_medres34_bn230428381.gif\n\n",
  "createdOn": 1682673575782,
  "bibcode": "2023GCN.33700....1F"
}