TITLE:   GCN CIRCULAR
NUMBER:  34575
SUBJECT: GRB 230827A: Fermi GBM Final Real-time Localization
DATE:    23/08/27 18:28:19 GMT
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 18:17:52 UT on 27 Aug 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230827A (trigger 714853077.93055 / 230827762).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 319.1, Dec = -23.9 (J2000 degrees, equivalent to J2000 21h 16m, -23d 53'), with a statistical uncertainty of 1.0 degrees.

The angle from the Fermi LAT boresight is 95.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230827762/quicklook/glg_skymap_all_bn230827762.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/bn230827762/quicklook/glg_healpix_all_bn230827762.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230827762/quicklook/glg_lc_medres34_bn230827762.gif