GCN Circular 33721
Subject
GRB 230503A: Fermi GBM Final Real-time Localization
Date
2023-05-03T20:29:45Z (a year 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 20:19:07 UT on 3 May 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230503A (trigger 704837952.436878 / 230503847).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 66.0, Dec = -48.7 (J2000 degrees, equivalent to J2000 04h 24m, -48d 42'), with a statistical uncertainty of 2.9 degrees.
The angle from the Fermi LAT boresight is 72.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230503847/quicklook/glg_skymap_all_bn230503847.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230503847/quicklook/glg_healpix_all_bn230503847.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230503847/quicklook/glg_lc_medres34_bn230503847.gif
