GCN Circular 25189
Subject
LIGO/Virgo S190728q: SPI-ACS/INTEGRAL data analysis
Date
2019-07-28T09:26:53Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
P. Minaev (IKI), A. Pozanenko (IKI), I. Chelovekov (IKI), S. Grebenev
(IKI) on behalf of IKI GRB FuN collaboration report:
Using SPI-ACS/INTEGRAL public data we performed a search for
counterpart of S190728q (LVC, GCN 25187). We found significant excesses
at +/- 100 sec around event time T0=2019-07-28T06:45:10.567644:
time after T0, duration, significance, fluence, assumed Eiso
-11.5, 1 s, 4.2 sigma, (1.7 +/- 0.4)*10e-7 erg/sm, (1.1 +/-0.3)*10e49 erg
42.5 s, 1 s, 3.5 sigma, (1.4 +/- 0.4)*10e-7 erg/sm2, (0.88+/-0.26)*10e49 erg
The fluence of the excesses is calculated for the angle of 74 degrees
toward most probable area of localization (LVC, GCN 25187). Eiso is
calculated assuming luminosity distance of 795 Mpc (LVC, GCN 25187).
The light curve of SPI-ACS can be found at
http://grb.rssi.ru/S190728q/S190728q_SPI-ACS_1sec_LC.png