TITLE:   GCN CIRCULAR
NUMBER:  31912
SUBJECT: GRB 220417A: Fermi GBM Final Real-time Localization
DATE:    22/04/17 14:04:01 GMT
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 13:52:35 UT on 17 Apr 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220417A (trigger 671896360.964484 / 220417578).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 107.7, Dec = 11.3 (J2000 degrees, equivalent to J2000 07h 10m, 11d 18'), with a statistical uncertainty of 8.2 degrees.

The angle from the Fermi LAT boresight is 99.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220417578/quicklook/glg_skymap_all_bn220417578.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/bn220417578/quicklook/glg_healpix_all_bn220417578.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220417578/quicklook/glg_lc_medres34_bn220417578.gif