TITLE:   GCN CIRCULAR
NUMBER:  33107
SUBJECT: GRB 221226B: Fermi GBM Final Real-time Localization
DATE:    22/12/26 22:51:47 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 22:41:20 UT on 26 Dec 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221226B (trigger 693787285.418586 / 221226945).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 16.3, Dec = -53.0 (J2000 degrees, equivalent to J2000 01h 05m, -53d 00'), with a statistical uncertainty of 9.8 degrees.

The angle from the Fermi LAT boresight is 46.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221226945/quicklook/glg_skymap_all_bn221226945.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/bn221226945/quicklook/glg_healpix_all_bn221226945.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221226945/quicklook/glg_lc_medres34_bn221226945.gif