[vsnet-grb-info 23090] LIGO/Virgo S190728q: SPI-ACS/INTEGRAL data analysis
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sun Jul 28 18:28:06 JST 2019
TITLE: GCN CIRCULAR
NUMBER: 25189
SUBJECT: LIGO/Virgo S190728q: SPI-ACS/INTEGRAL data analysis
DATE: 19/07/28 09:26:53 GMT
FROM: Alexei Pozanenko at IKI, Moscow <apozanen at 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
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