GCN Circular 24727
Subject
LIGO/Virgo S190602aq: upper limit in INTEGRAL SPI-ACS prompt observations
Event
Date
2019-06-03T08:19:11Z (6 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
P. Minaev, A. Pozanenko, S. Grebenev, I. Chelovekov on behalf of IKI GRB FuN
collaboration report:
We used public data of SPI-ACS to perform a search for possible
EM-counterpart of LIGO/Virgo S190602aq. Before and after trigger time of
S190602aq we did not find any significant candidate (at the level more than
3 sigma) in time scales from 0.05 s up to 100 s.
The angle between the center of the error box of the S190602aq localization
by LIGO/Virgo and the SPI axis is 129 degrees, and the region of the LIGO
probability is not occulted by the Earth.
The 3 sigma upper limits in the energy range of 75 - 1000 keV are 1.2 *
10^-7 erg/cm2 (1 s time scale), and 1.2 * 10^-6 erg/cm2 (100 s time
scale).