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GCN Circular 33420

Subject
GRB 230308A: Fermi GBM Final Real-time Localization
Date
2023-03-08T13:42:49Z (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 SHORT GRB

At 13:32:27 UT on 8 Mar 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230308A (trigger 699975152.401482 / 230308564).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 94.9, Dec = 68.5 (J2000 degrees, equivalent to J2000 06h 19m, 68d 30'), with a statistical uncertainty of 1.2 degrees.

The angle from the Fermi LAT boresight is 42.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230308564/quicklook/glg_skymap_all_bn230308564.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/bn230308564/quicklook/glg_healpix_all_bn230308564.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230308564/quicklook/glg_lc_medres34_bn230308564.gif
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