[vsnet-grb-info 24433] GRB 191221A: Fermi GBM Final Real-time Localization

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  26532
SUBJECT: GRB 191221A: Fermi GBM Final Real-time Localization
DATE:    19/12/21 19:24:53 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 19:14:28 UT on 21 Dec 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 191221A (trigger 598648473.844298 / 191221802).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 40.8, Dec = -43.0 (J2000 degrees, equivalent to J2000 02h 43m, -43d 00'), with a statistical uncertainty of 5.9 degrees.

The angle from the Fermi LAT boresight is 21.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191221802/quicklook/glg_skymap_all_bn191221802.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191221802/quicklook/glg_healpix_all_bn191221802.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191221802/quicklook/glg_lc_medres34_bn191221802.gif