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GCN Circular 33104

Subject
GRB 221226A: Fermi GBM Final Real-time Localization
Date
2022-12-26T16:54:45Z (a year 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 16:44:27 UT on 26 Dec 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221226A (trigger 693765872.056908 / 221226698).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 68.2, Dec = 34.8 (J2000 degrees, equivalent to J2000 04h 32m, 34d 47'), with a statistical uncertainty of 1.2 degrees.

The angle from the Fermi LAT boresight is 97.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221226698/quicklook/glg_skymap_all_bn221226698.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/bn221226698/quicklook/glg_healpix_all_bn221226698.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221226698/quicklook/glg_lc_medres34_bn221226698.gif
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