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GCN Circular 35565

Subject

GRB 240118C: BALROG localization (Fermi Trigger 727291408 / GRB 240118725)

Date

2024-01-18T17:59:26Z (4 months ago)

From

Jochen Greiner at MPE <jcgrog@mpe.mpg.de>

Via

T. Preis, B. Biltzinger, J. Burgess & J. Greiner (all MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
727291408 at 17:23:23 on 18 Jan. 2024 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 is:
RA(2000.0) = 305.3 deg
Decl.(2000.0) = -9.8 deg
The 1 sigma statistical error radius is 1.6 deg.
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB240118725/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB240118725/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB240118725/json