{
  "bibcode": "2021GCN.29870....1F",
  "body": "The Fermi GBM team reports the detection of a likely short GRB\n\nAt 10:54:44.812 UT on 21 Apr 2021, the Fermi Gamma-ray Burst Monitor\n(GBM) triggered and located GRB 210421B (trigger 640695289 /\n210421455).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 272.1, Dec = 57.2(J2000 degrees, equivalent to J2000 18h 08m,\n57d 09'), with a statistical uncertainty of 2.1 degrees.\n\nThe angle from the Fermi LAT boresight is 20.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210421455/quicklook/glg_skymap_all_bn210421455.png\n\nThe HEALPix FITS file, including the estimated localization\nsystematic, can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210421455/quicklook/glg_healpix_all_bn210421455.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210421455/quicklook/glg_lc_medres34_bn210421455.gif",
  "circularId": 29870,
  "createdOn": 1619035390000,
  "email": "joseph.mangan@ucdconnect.ie",
  "subject": "GRB 210421B: Fermi GBM Final Localization",
  "submitter": "Joe Mangan at UCD  <joseph.mangan@ucdconnect.ie>",
  "eventId": "GRB 210421B"
}