TITLE:   GCN CIRCULAR
NUMBER:  29831
SUBJECT: GRB 210419B: Fermi GBM Final Real-time Localization
DATE:    21/04/19 21:20:46 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 21:10:28 UT on 19 Apr 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210419B (trigger 640559433.454802 / 210419882).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 307.1, Dec = -0.1 (J2000 degrees, equivalent to J2000 20h 28m, 0d 06'), with a statistical uncertainty of 1.4 degrees.

The angle from the Fermi LAT boresight is 18.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210419882/quicklook/glg_skymap_all_bn210419882.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/bn210419882/quicklook/glg_healpix_all_bn210419882.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210419882/quicklook/glg_lc_medres34_bn210419882.gif