GCN Circular 31818
Subject
GRB 220403A: Fermi GBM Final Real-time Localization
Date
2022-04-03T10:21:18Z (3 years ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
The Fermi GBM team reports the detection of a likely LONG GRB
At 10:10:02 UT on 3 Apr 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220403A (trigger 670673407.661128 / 220403424).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 56.5, Dec = -44.3 (J2000 degrees, equivalent to J2000 03h 46m, -44d 17'), with a statistical uncertainty of 15.3 degrees.
The angle from the Fermi LAT boresight is 14.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220403424/quicklook/glg_skymap_all_bn220403424.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/bn220403424/quicklook/glg_healpix_all_bn220403424.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220403424/quicklook/glg_lc_medres34_bn220403424.gif