GCN Circular 27748
Subject
GRB 200514B: BALROG localization (Fermi Trigger 611140062 / GRB 200514380)
Date
2020-05-16T20:33:50Z (5 years ago)
From
Jochen Greiner at MPI <jcg@mpe.mpg.de>
J.M. Burgess, J. Greiner, F. Berlato, B. Biltzinger, F. Kunzweiler (all MPE
Garching) report:
Given the interest in this GRB and the optical follow-up work, we
performed a more thorough analysis of the GRB 200514B with the BALROG
localization/spectral fitting method (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60), finding a localization of
RA (2000.0) = 260 +/- 12
Decl. (2000.0) = 58.8 +/- 6.8
(1 sigma error).
The Healpix map can be found at:
http://mpe.mpg.de/~jcg/grb200514B/GRB200514380_balrog_healpix.fits
Spectral analysis of the time interval T0 = -0.38 ... 0.58s with
the empirical Band function yields the following best-fit spectral
parameters:
alpha = -0.63 +/- 0.30
beta = -2.13 +/- 0.29
Ep = 170 +/- 70 keV
with an energy flux of (3.5 +/-2) x 10^-7 erg/cm2/s in the 10-1000 keV band.