GCN Circular 31329
Subject
GRB 211229A: Fermi GBM Final Real-time Localization
Date
2021-12-29T03:39:48Z (3 years ago)
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 03:29:15 UT on 29 Dec 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211229A (trigger 662441360.901398 / 211229145).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 295.0, Dec = 22.9 (J2000 degrees, equivalent to J2000 19h 40m, 22d 53'), with a statistical uncertainty of 3.7 degrees.
The angle from the Fermi LAT boresight is 94.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211229145/quicklook/glg_skymap_all_bn211229145.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/bn211229145/quicklook/glg_healpix_all_bn211229145.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211229145/quicklook/glg_lc_medres34_bn211229145.gif