TITLE:   GCN CIRCULAR
NUMBER:  38698
SUBJECT: GRB 241229B: Fermi GBM Final Real-time Localization
DATE:    24/12/29 01:46:54 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 01:36:16 UT on 29 Dec 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241229B (trigger 757128981.063788 / 241229067).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 275.0, Dec = 62.4 (J2000 degrees, equivalent to J2000 18h 19m, 62d 23'), with a statistical uncertainty of 6.1 degrees.

The angle from the Fermi LAT boresight is 27.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241229067/quicklook/glg_skymap_all_bn241229067.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/bn241229067/quicklook/glg_healpix_all_bn241229067.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241229067/quicklook/glg_lc_medres34_bn241229067.gif