TITLE:   GCN CIRCULAR
NUMBER:  27748
SUBJECT: GRB 200514B: BALROG localization (Fermi Trigger 611140062 / GRB 200514380)
DATE:    20/05/16 20:33:50 GMT
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.