TITLE:   GCN CIRCULAR
NUMBER:  30319
SUBJECT: GRB 210625A: Fermi GBM Final Real-time Localization
DATE:    21/06/25 21:33:39 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 21:23:21 UT on 25 Jun 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210625A (trigger 646349006.139788 / 210625891).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 247.5, Dec = -41.0 (J2000 degrees, equivalent to J2000 16h 30m, -41d 00'), with a statistical uncertainty of 7.6 degrees.

The angle from the Fermi LAT boresight is 26.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210625891/quicklook/glg_skymap_all_bn210625891.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/bn210625891/quicklook/glg_healpix_all_bn210625891.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210625891/quicklook/glg_lc_medres34_bn210625891.gif