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GCN Circular 34795

Subject
GRB 231004A: Fermi GBM Final Real-time Localization
Date
2023-10-04T08:33:54Z (8 months ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely LONG GRB

At 08:23:35 UT on 4 Oct 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231004A (trigger 718100620.108376 / 231004350).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 68.3, Dec = -9.9 (J2000 degrees, equivalent to J2000 04h 33m, -9d 54'), with a statistical uncertainty of 3.4 degrees.

The angle from the Fermi LAT boresight is 94.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231004350/quicklook/glg_skymap_all_bn231004350.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/bn231004350/quicklook/glg_healpix_all_bn231004350.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231004350/quicklook/glg_lc_medres34_bn231004350.gif


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