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GCN Circular 33910

Subject
GRB 230603A: Fermi GBM Final Real-time Localization
Date
2023-06-03T12:45:56Z (10 months 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 12:35:29 UT on 3 Jun 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230603A (trigger 707488534.44648 / 230603525).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 294.5, Dec = -11.6 (J2000 degrees, equivalent to J2000 19h 37m, -11d 35'), with a statistical uncertainty of 3.6 degrees.

The angle from the Fermi LAT boresight is 38.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230603525/quicklook/glg_skymap_all_bn230603525.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/bn230603525/quicklook/glg_healpix_all_bn230603525.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230603525/quicklook/glg_lc_medres34_bn230603525.gif


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