TITLE:   GCN CIRCULAR
NUMBER:  36295
SUBJECT: GRB 240425A: Fermi GBM Final Real-time Localization
DATE:    24/04/25 00:33:16 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 00:21:20 UT on 25 Apr 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240425A (trigger 735697285.341006 / 240425015).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 227.7, Dec = 46.7 (J2000 degrees, equivalent to J2000 15h 10m, 46d 42'), with a statistical uncertainty of 3.6 degrees.

The angle from the Fermi LAT boresight is 86.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240425015/quicklook/glg_skymap_all_bn240425015.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/bn240425015/quicklook/glg_healpix_all_bn240425015.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240425015/quicklook/glg_lc_medres34_bn240425015.gif