GCN Circular 30059
Subject
GRB 210520A: Fermi GBM Final Real-time Localization
Date
2021-05-20T19:17:25Z (3 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 19:07:02 UT on 20 May 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210520A (trigger 643230427.939988 / 210520797).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 147.9, Dec = -67.0 (J2000 degrees, equivalent to J2000 09h 51m, -67d 00'), with a statistical uncertainty of 3.7 degrees.
The angle from the Fermi LAT boresight is 15.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210520797/quicklook/glg_skymap_all_bn210520797.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/bn210520797/quicklook/glg_healpix_all_bn210520797.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210520797/quicklook/glg_lc_medres34_bn210520797.gif