GCN Circular 25018
Subject
LIGO/Virgo S190707q: No counterpart candidates in AGILE-MCAL observations
Date
2019-07-07T14:28:18Z (5 years ago)
From
Fabrizio Lucarelli at SSDC/INAF-OAR <fabrizio.lucarelli@ssdc.asi.it>
F. Longo (Univ. Trieste, and INFN Trieste), C.Pittori, F. Lucarelli, F. Verrecchia
(SSDC, and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), M. Cardillo,
C. Casentini, G. Piano, A. Ursi (INAF/IAPS), A. Bulgarelli, V. Fioretti, N. Parmiggiani
(INAF/OAS-Bologna), M. Pilia (INAF/OA-Cagliari) report on behalf of the AGILE Team:
In response to the LIGO/Virgo GW event S190707q at T0 = 2019-07-07 09:33:26 (UT),
a preliminary analysis of the AGILE minicalorimeter (MCAL) triggered data found no
event candidates within a time interval covering -/+ 15 sec from the LIGO/Virgo T0.
At the T0, about 80% of the S190707q 90% c.l. localization region was accessible to
the AGILE-MCAL. Three-sigma upper limits (ULs) are obtained for a 1 s integration
time at different celestial positions within the accessible S190707q localization
region, from a minimum of 1.4E-06 erg cm^-2 to a maximum of 6.7E-06 erg cm^-2 (assuming
as spectral model a single power law with photon index 1.5).
The AGILE-MCAL detector is a CsI detector with a 4 pi FoV, sensitive in the energy
range 0.4-100 MeV. Additional analysis of AGILE data is in progress.