[vsnet-grb-info 19281] IceCube-170321A: Konus-Wind upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  20973
SUBJECT: IceCube-170321A: Konus-Wind upper limits
DATE:    17/04/03 13:48:59 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin at mail.ioffe.ru>

D. Svinkin, S. Golenetskii, R.Aptekar, D. Frederiks, P. Oleynik,
M. Ulanov, A. Tsvetkova, A.Lysenko, A. Kozlova, and T. Cline,
on behalf of the Konus-Wind team, report:

Using Konus-Wind (KW) waiting mode data, we have performed a search for
a gamma-ray transient around the time of the cosmic neutrino candidate 
IceCube-170321A (2017-03-21 07:32:20.69 UT, hereafter T0; Blaufuss, GCN 
20929).

In the interval T0 +/- 1000 s we estimate an upper limit (90% conf.) on 
the 10 keV – 10 MeV fluence to ~6.6x10^-7 erg/cm^2 for a burst lasting 
less than 2.944 s and having a typical KW short GRB spectrum (an 
exponentially cut off power law with alpha
=-0.5 and Ep=500 keV). For a 
typical long GRB spectrum (the Band function with alpha=-1, beta=-2.5, 
and Ep=300 keV), the corresponding limiting peak flux is ~2.3x10^-7 
erg/cm^2/s (10 keV - 10 MeV, 2.944 s scale).

All the quoted values are preliminary.