GCN Circular 35594
Subject
Konus-Wind detection of GRB 240119A (short/hard)
Event
Date
2024-01-22T15:40:27Z (2 years ago)
From
Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>
Via
legacy email
D. Frederiks, A.Lysenko, A. Ridnaia, D. Svinkin,
A. Tsvetkova, M. Ulanov, and T. Cline,
on behalf of the Konus-Wind team, report:
The short GRB 240119A (Fermi-GBM detection: The Fermi GBM team, GCN 35583;
AstroSat-CZTI detection: Joshi et al.: GCN 35589;
GECAM-B detection: Zhang et al.: GCN 355921;
IPN triangulation: Svinkin et al., GCN 35592)
triggered Konus-Wind (KW) at T0=62945.465 s UT (17:29:05.465).
The burst light curve shows a single emission pulse
which starts at ~T0-0.032 s and has a duration of ~0.13 s.
The emission is seen up to ~2 MeV.
The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB240119_T62945/
As observed by Konus-Wind, the burst had
a total fluence of (8.1 ± 1.7)x10^-7 erg/cm^2 and
a 16-ms peak energy flux, measured from T0-0.016 s,
of (1.9 ± 0.4)x10^-5 erg/cm^2/s (both in the 20 keV - 10 MeV energy range).
The spectrum of the burst (measured from T0-0.048 s to T0+0.080 s)
can be described, in the 20 keV - 1.5 MeV range, by a power law with
exponential cutoff (CPL) model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)
with alpha = -0.23(-0.32,+0.40) and Ep = 678(-141,+254) keV.
All the quoted errors are estimated at the 68% confidence level.
All the presented results are preliminary.