GCN Circular 24063
Subject
LIGO-Virgo S190408an: AGILE MCAL observations
Date
2019-04-08T20:42:39Z (5 years ago)
From
Fabrizio Lucarelli at SSDC/INAF-OAR <fabrizio.lucarelli@ssdc.asi.it>
F. Lucarelli (SSDC, and INAF/OAR), A. Ursi (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), M. Cardillo, C. Casentini, G. Piano, C. Pittori, F. Verrecchia (SSDC, and INAF/OAR), A. Bulgarelli, N. Parmiggiani (INAF/OAS-Bologna), M. Pilia (INAF/OA-Cagliari), F. Longo (Univ. Trieste, and INFN Trieste) report on behalf of the AGILE Team:
In response to the LIGO-Virgo GW event S190408an at T0 = 2019-04-08 18:18:02 (UT), a preliminary analysis of the AGILE MiniCalorimeter (MCAL) data found no event candidates within a time interval covering -15 / + 8 sec from the LIGO-Virgo T0. Two-sigma upper limits (ULs) are obtained for a 1 s integration time at different celestial positions within the accessible S190408an localization region, from a minimum of 1.3E-06 erg cm^-2 to a maximum of 2.2E-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.
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Fabrizio Lucarelli, PhD
ASI Space Science Data Center (SSDC/ASDC) & INAF-OAR
Via del Politecnico snc
00133 Rome, Italy
Tel. +39 068567404