TITLE:   GCN CIRCULAR
NUMBER:  35809
SUBJECT: GRB 240226B: Fermi GBM Final Real-time Localization
DATE:    24/02/26 21:41:00 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 05:40:04 UT on 26 Feb 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240226B (trigger 730618809.579832 / 240226236).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 353.7, Dec = -24.4 (J2000 degrees, equivalent to J2000 23h 34m, -24d 23'), with a statistical uncertainty of 5.4 degrees.

The angle from the Fermi LAT boresight is 100.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240226236/quicklook/glg_skymap_all_bn240226236.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/bn240226236/quicklook/glg_healpix_all_bn240226236.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240226236/quicklook/glg_lc_medres34_bn240226236.gif