GCN Circular 30821
Subject
GRB 210912B: Fermi GBM Final Real-time Localization
Date
2021-09-12T12:38:51Z (4 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 12:31:34 UT on 12 Sep 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210912B (trigger 653142699.29167 / 210912522).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 344.9, Dec = 24.6 (J2000 degrees, equivalent to J2000 22h 59m, 24d 36'), with a statistical uncertainty of 12.3 degrees.
The angle from the Fermi LAT boresight is 103.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210912522/quicklook/glg_skymap_all_bn210912522.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/bn210912522/quicklook/glg_healpix_all_bn210912522.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210912522/quicklook/glg_lc_medres34_bn210912522.gif