TITLE:   GCN CIRCULAR
NUMBER:  38474
SUBJECT: GRB 241209A: Fermi GBM Final Real-time Localization
DATE:    24/12/09 05:46:17 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 SHORT GRB

At 05:35:44 UT on 9 Dec 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241209A (trigger 755415349.162358 / 241209233).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 155.1, Dec = 10.2 (J2000 degrees, equivalent to J2000 10h 20m, 10d 11'), with a statistical uncertainty of 12.8 degrees.

The angle from the Fermi LAT boresight is 77.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241209233/quicklook/glg_skymap_all_bn241209233.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/bn241209233/quicklook/glg_healpix_all_bn241209233.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241209233/quicklook/glg_lc_medres34_bn241209233.gif