GCN Circular 31777
Subject
GRB 220321A: Fermi GBM Final Localization
Date
2022-03-21T15:44:33Z (3 years ago)
From
Joshua Wood at MSFC/Fermi-GBM <joshua.r.wood@nasa.gov>
The Fermi GBM team reports the detection of a likely SHORT GRB
At 06:46:22.00 UT on 21 Mar 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220321A (trigger 669537987 / 220321282).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 170.8, Dec = 28.9 (J2000 degrees, equivalent to J2000 11h 23m, +28d 54'), with a statistical uncertainty of 8.6 degrees.
The angle from the Fermi LAT boresight is 57.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220321282/quicklook/glg_skymap_all_bn220321282.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220321282/quicklook/glg_healpix_all_bn220321282.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220321282/quicklook/glg_lc_medres34_bn220321282.gif