TITLE:   GCN CIRCULAR
NUMBER:  29987
SUBJECT: GRB 210511A: Fermi GBM Final Real-time Localization
DATE:    21/05/11 11:09:18 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 10:58:57 UT on 11 May 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210511A (trigger 642423542.350354 / 210511458).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 249.3, Dec = 69.0 (J2000 degrees, equivalent to J2000 16h 37m, 69d 00'), with a statistical uncertainty of 10.5 degrees.

The angle from the Fermi LAT boresight is 34.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210511458/quicklook/glg_skymap_all_bn210511458.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/bn210511458/quicklook/glg_healpix_all_bn210511458.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210511458/quicklook/glg_lc_medres34_bn210511458.gif