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TITLE:   GCN CIRCULAR
NUMBER:  28245
SUBJECT: GRB 200811A: BALROG localization (Fermi Trigger 618851447 / GRB 200811632)
DATE:    20/08/11 15:35:30 GMT
FROM:    Jochen Greiner at MPE,Garching  <jcg@mpe.mpg.de>

B. Biltzinger, F. Kunzweiler, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
618851447 at 15:10:42 on 11 Aug. 2020 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).

The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 122.2+/-1.8 deg
Decl.(2000.0) = -4.9+/-1.8 deg
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB200811632/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB200811632/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB200811632/json

                        

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TITLE:   GCN CIRCULAR
NUMBER:  28246
SUBJECT: GRB 200811A: Fermi GBM Final Real-time Localization
DATE:    20/08/11 17:38:58 GMT
FROM:    Joshua Wood at MSFC/Fermi-GBM  <joshua.r.wood@nasa.gov>

The Fermi GBM team reports the detection of a likely LONG GRB

At 15:10:42 UT on 11 Aug 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200811A (trigger 618851447 / 200811632).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 120.2, Dec = -4.80 (J2000 degrees, equivalent to J2000 8h 1m, -4d 48'), with a statistical uncertainty of 1.7 degrees.

The angle from the Fermi LAT boresight is 60.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200811632/quicklook/glg_skymap_all_bn200811632.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/bn200811632/quicklook/glg_healpix_all_bn200811632.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200811632/quicklook/glg_lc_medres34_bn200811632.gif