TITLE:   GCN CIRCULAR
NUMBER:  29792
SUBJECT: GRB 210411B: Fermi GBM Final Real-time Localization
DATE:    21/04/11 13:43:07 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 13:32:44 UT on 11 Apr 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210411B (trigger 639840769.632692 / 210411564).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 115.7, Dec = -74.8 (J2000 degrees, equivalent to J2000 07h 42m, -74d 47'), with a statistical uncertainty of 4.5 degrees.

The angle from the Fermi LAT boresight is 60.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210411564/quicklook/glg_skymap_all_bn210411564.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/bn210411564/quicklook/glg_healpix_all_bn210411564.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210411564/quicklook/glg_lc_medres34_bn210411564.gif