TITLE:   GCN CIRCULAR
NUMBER:  38674
SUBJECT: GRB 241226A: Fermi GBM Final Real-time Localization
DATE:    24/12/26 22:44:18 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 22:33:39 UT on 26 Dec 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241226A (trigger 756945224.664144 / 241226940).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 79.2, Dec = 6.0 (J2000 degrees, equivalent to J2000 05h 16m, 6d 00'), with a statistical uncertainty of 6.8 degrees.

The angle from the Fermi LAT boresight is 73.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241226940/quicklook/glg_skymap_all_bn241226940.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241226940/quicklook/glg_healpix_all_bn241226940.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241226940/quicklook/glg_lc_medres34_bn241226940.gif