[vsnet-grb-info 28182] GRB 210621A: Fermi GBM Final Real-time Localization

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  30285
SUBJECT: GRB 210621A: Fermi GBM Final Real-time Localization
DATE:    21/06/21 10:54:22 GMT
FROM:    Fermi GBM Team at MSFC/Fermi-GBM  <do_not_reply at GIOC.nsstc.nasa.gov>

The Fermi GBM team reports the detection of a likely SHORT GRB

At 10:44:03 UT on 21 Jun 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210621A (trigger 645965048.749786 / 210621447).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 248.3, Dec = -61.1 (J2000 degrees, equivalent to J2000 16h 33m, -61d 06'), with a statistical uncertainty of 8.6 degrees.

The angle from the Fermi LAT boresight is 78.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210621447/quicklook/glg_skymap_all_bn210621447.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/bn210621447/quicklook/glg_healpix_all_bn210621447.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210621447/quicklook/glg_lc_medres34_bn210621447.gif