GRB 190531, GRB 190531A
GCN Circular 24696
Subject
Fermi Trigger 581026217 / GRB 190531840 / GRB190531A: BALROG localization
Date
2019-05-31T20:44:35Z (7 years ago)
From
Jochen Greiner at MPE,Garching <jcg@mpe.mpg.de>
F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
581026217 at 20:10:12 on 31 May 2019 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) = 27.9+/-0.8 deg
Decl.(2000.0) = -40.8+/-0.6 deg
We estimate an additional systematic error of 2 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB190531840/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB190531840/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB190531840/json
GCN Circular 24691
Subject
GRB 190531A: Fermi GBM Final Real-time Localization
Date
2019-05-31T07:40:41Z (7 years 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 07:29:11 UT on 31 May 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 190531A (trigger 580980556.825258 / 190531312).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 21.1, Dec = 16.4 (J2000 degrees, equivalent to J2000 01h 24m, 16d 23'), with a statistical uncertainty of 2.2 degrees.
The angle from the Fermi LAT boresight is 57.0 degrees.
The skymap can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190531312/quicklook/glg_skymap_all_bn190531312.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190531312/quicklook/glg_healpix_all_bn190531312.fit
The GBM light curve can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190531312/quicklook/glg_lc_medres34_bn190531312.gif