TITLE: GCN CIRCULAR NUMBER: 25335 SUBJECT: LIGO/Virgo S190814bv: Upper limits from AGILE-GRID observations DATE: 19/08/15 11:36:07 GMT FROM: Maura Pillia at INAF M. Pilia (INAF/OA-Cagliari), C.Pittori (SSDC, and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), F. Lucarelli, F. Verrecchia (SSDC, and INAF/OAR), F. Longo (Univ. Trieste, and INFN Trieste), M. Cardillo, C. Casentini, G. Piano, A. Ursi (INAF/IAPS), A. Bulgarelli, V. Fioretti, N. Parmiggiani (INAF/OAS-Bologna), report on behalf of the AGILE Team: In response to the LIGO-Virgo GW event S190814bv at T0 = 2019-08-14 21:10:39(UT), a preliminary analysis of the AGILE data at T0 shows that the Gamma-Ray Imaging Detector (GRID) exposure covered ~100% of the 90% c.l. localization region (LR), observed at off-axis angles above 60 deg. We performed an analysis of the GRID data in the energy range 50 MeV - 10 GeV on T0, when good exposure of the S190814bv 90% c.l. LR was available. No candidate gamma-ray transient was detected. The following preliminary GRID values of 3-sigma upper limit (UL) are obtained: (T0-2s; T0+2s): from 2.1e-06 to 4.0e-06 erg cm^-2 s^-1; (T0; T0+5s): from 2.0e-06 to 5.2e-06 erg cm^-2 s^-1; (T0; T0+10s); from 1.1e-06 to 5.2e-06 erg cm^-2 s^-1; (T0; T0+100s); from 5.7e-07 to 5.2e-06 erg cm^-2 s^-1. These measurements were obtained with AGILE observing a large portion of the sky in spinning mode. Additional analysis of AGILE data is in progress.