GCN Circular 30074
Subject
GRB 210524B: Fermi GBM Final Real-time Localization
Date
2021-05-24T11:30:50Z (4 years ago)
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 11:20:34 UT on 24 May 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210524B (trigger 643548039.686002 / 210524473).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 148.5, Dec = 7.8 (J2000 degrees, equivalent to J2000 09h 54m, 7d 47'), with a statistical uncertainty of 4.8 degrees.
The angle from the Fermi LAT boresight is 92.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210524473/quicklook/glg_skymap_all_bn210524473.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210524473/quicklook/glg_healpix_all_bn210524473.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210524473/quicklook/glg_lc_medres34_bn210524473.gif