TITLE:   GCN CIRCULAR
NUMBER:  28236
SUBJECT: GRB 200809B: Fermi GBM Final Real-time Localization
DATE:    20/08/09 15:51:48 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 15:41:27 UT on 9 Aug 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200809B (trigger 618680492.129862 / 200809654).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 359.8, Dec = -76.9 (J2000 degrees, equivalent to J2000 23h 59m, -76d 54'), with a statistical uncertainty of 3.4 degrees.

The angle from the Fermi LAT boresight is 116.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200809654/quicklook/glg_skymap_all_bn200809654.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200809654/quicklook/glg_healpix_all_bn200809654.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200809654/quicklook/glg_lc_medres34_bn200809654.gif