TITLE:   GCN CIRCULAR
NUMBER:  36039
SUBJECT: GRB 240405B: Fermi GBM Final Real-time Localization
DATE:    24/04/05 22:32:47 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 22:22:27 UT on 5 Apr 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240405B (trigger 734048552.443682 / 240405932).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 262.8, Dec = 44.8 (J2000 degrees, equivalent to J2000 17h 31m, 44d 47'), with a statistical uncertainty of 8.7 degrees.

The angle from the Fermi LAT boresight is 55.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240405932/quicklook/glg_skymap_all_bn240405932.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/bn240405932/quicklook/glg_healpix_all_bn240405932.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240405932/quicklook/glg_lc_medres34_bn240405932.gif