TITLE:   GCN CIRCULAR
NUMBER:  37204
SUBJECT: GRB 240820A: Fermi GBM Final Real-time Localization
DATE:    24/08/20 02:03:09 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 01:54:40 UT on 20 Aug 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240820A (trigger 745811685.074218 / 240820080).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 142.3, Dec = 49.5 (J2000 degrees, equivalent to J2000 09h 29m, 49d 30'), with a statistical uncertainty of 29.5 degrees.

The angle from the Fermi LAT boresight is 165.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240820080/quicklook/glg_skymap_all_bn240820080.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/bn240820080/quicklook/glg_healpix_all_bn240820080.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240820080/quicklook/glg_lc_medres34_bn240820080.gif