GCN Circular 37219
Subject
GRB 240821A: Fermi GBM Final Real-time Localization
Date
2024-08-21T18:46:35Z (3 months ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely SHORT GRB
At 18:36:02 UT on 21 Aug 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240821A (trigger 745958167.601766 / 240821775).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 348.4, Dec = -14.1 (J2000 degrees, equivalent to J2000 23h 13m, -14d 05'), with a statistical uncertainty of 2.0 degrees.
The angle from the Fermi LAT boresight is 89.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240821775/quicklook/glg_skymap_all_bn240821775.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/bn240821775/quicklook/glg_healpix_all_bn240821775.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240821775/quicklook/glg_lc_medres34_bn240821775.gif