GCN Circular 31740
Subject
GRB 220311A: Fermi GBM Final Real-time Localization
Date
2022-03-11T16:43:54Z (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 16:33:18 UT on 11 Mar 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220311A (trigger 668709203.400826 / 220311690).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 131.1, Dec = 55.0 (J2000 degrees, equivalent to J2000 08h 44m, 55d 00'), with a statistical uncertainty of 18.6 degrees.
The angle from the Fermi LAT boresight is 111.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220311690/quicklook/glg_skymap_all_bn220311690.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220311690/quicklook/glg_healpix_all_bn220311690.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220311690/quicklook/glg_lc_medres34_bn220311690.gif