TITLE:   GCN CIRCULAR
NUMBER:  30332
SUBJECT: GRB 210627B: Fermi GBM Final Real-time Localization
DATE:    21/06/27 18:07:45 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 17:57:20 UT on 27 Jun 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210627B (trigger 646509445.742424 / 210627748).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 234.8, Dec = -6.0 (J2000 degrees, equivalent to J2000 15h 39m, -6d 00'), with a statistical uncertainty of 2.1 degrees.

The angle from the Fermi LAT boresight is 48.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210627748/quicklook/glg_skymap_all_bn210627748.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/bn210627748/quicklook/glg_healpix_all_bn210627748.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210627748/quicklook/glg_lc_medres34_bn210627748.gif