TITLE:   GCN CIRCULAR
NUMBER:  30330
SUBJECT: GRB 210627A: Fermi GBM Final Real-time Localization
DATE:    21/06/27 07:39:37 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 07:29:15 UT on 27 Jun 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210627A (trigger 646471760.677184 / 210627312).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 148.3, Dec = 44.5 (J2000 degrees, equivalent to J2000 09h 53m, 44d 30'), with a statistical uncertainty of 10.7 degrees.

The angle from the Fermi LAT boresight is 109.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210627312/quicklook/glg_skymap_all_bn210627312.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/bn210627312/quicklook/glg_healpix_all_bn210627312.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210627312/quicklook/glg_lc_medres34_bn210627312.gif