GCN Circular 28192
Subject
Konus-Wind detection of GRB 200729A
Date
2020-08-02T16:38:02Z (4 years ago)
From
Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>
A. Ridnaia, S. Golenetskii, R.Aptekar, D. Frederiks,
M. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko,
and T. Cline on behalf of the Konus-Wind team, report:
The long GRB 200729A (Swift trigger #984929:
Evans et al., GCN 28165, Krimm et al., GCN 28179;
Fermi-GBM Sub-Threshold candidate: Malacaria et al., GCN 28174)
was detected by Konus-Wind in the waiting mode.
The burst light curve shows a single emission episode
with a duration of ~ 74 s.
The K-W light curve of this burst is available at
http://www.ioffe.rssi.ru/LEA/GRBs/GRB200729A/
As observed by Konus-Wind, the burst had a fluence of
5.23(-1.00,+1.32)x10^-6 erg/cm2 and a 2.944-s peak flux,
measured from ~T0(BAT)+5.8 s, of 2.18(-0.55,+0.66)x10^-7 erg/cm2/s
(both in the 20 - 1500 keV energy range).
The K-W 3-channel time-integrated spectrum
(from ~T0(BAT) s to ~T0(BAT)+73.5 s)
is well described by a cutoff power-law model
with alpha = -0.47(-0.3,+0.5) and Ep = 269(-65,+105) keV.
All the quoted errors are estimated at the 1 sigma confidence level.
All the presented results are preliminary.