TITLE:   GCN CIRCULAR
NUMBER:  31854
SUBJECT: GRB 220408B: Fermi GBM Final Localization
DATE:    22/04/08 13:59:04 GMT
FROM:    Elisabetta Bissaldi at INFN,Bari  <elisabetta.bissaldi@ba.infn.it>

The Fermi GBM team reports the detection of a likely LONG GRB.

At 07:28:04.65 UT on 8 Apr 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220408B (trigger 671095689.64512 / 220408311).

The on-ground calculated location, using the Fermi GBM trigger data, is RA =  94.8, Dec = -50.9 (J2000 degrees, equivalent to J2000 06h 19m, -50d 54'), with a statistical uncertainty of 2.2 degrees.

The angle from the Fermi LAT boresight is 30.3 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220408311/quicklook/glg_skymap_all_bn220408311.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/bn220408311/quicklook/glg_healpix_all_bn220408311.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220408311/quicklook/glg_lc_medres34_bn220408311.gif