TITLE:   GCN CIRCULAR
NUMBER:  30071
SUBJECT: GRB 210524A: Fermi GBM Final Real-time Localization
DATE:    21/05/24 05:10:21 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 04:59:59 UT on 24 May 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210524A (trigger 643525204.091768 / 210524208).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 337.3, Dec = -47.0 (J2000 degrees, equivalent to J2000 22h 29m, -47d 00'), with a statistical uncertainty of 1.5 degrees.

The angle from the Fermi LAT boresight is 65.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210524208/quicklook/glg_skymap_all_bn210524208.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/bn210524208/quicklook/glg_healpix_all_bn210524208.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210524208/quicklook/glg_lc_medres34_bn210524208.gif