GRB 230517A
GCN Circular 33809
Subject
GRB 230517A: BALROG localization (Fermi Trigger 706014351 / GRB 230517462)
Date
2023-05-17T12:51:43Z (2 years ago)
From
Jochen Greiner at MPI <jcg@mpe.mpg.de>
B. Biltzinger, F. Kunzweiler, J. Burgess & J. Greiner (all MPE Garching)
report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
706014351 at 11:05:46 on 17 May 2023 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) = 119.1+/-1.9 deg
Decl.(2000.0) = -48.6+/-0.7 deg
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB230517462/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB230517462/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB230517462/json
GCN Circular 33807
Subject
GRB 230517A: Fermi GBM Final Real-time Localization
Date
2023-05-17T11:17:12Z (2 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 11:05:46 UT on 17 May 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230517A (trigger 706014351.299236 / 230517462).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 120.7, Dec = -49.1 (J2000 degrees, equivalent to J2000 08h 02m, -49d 06'), with a statistical uncertainty of 1.6 degrees.
The angle from the Fermi LAT boresight is 23.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230517462/quicklook/glg_skymap_all_bn230517462.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/bn230517462/quicklook/glg_healpix_all_bn230517462.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230517462/quicklook/glg_lc_medres34_bn230517462.gif