TITLE: GCN CIRCULAR NUMBER: 21446 SUBJECT: LIGO/Virgo G296853: Super-AGILE observations DATE: 17/08/10 17:54:06 GMT FROM: Francesco Verrecchia at ASDC, INAF-OAR Y. Evangelista (INAF/IAPS), E. Del Monte (INAF/IAPS), F. Verrecchia (SSDC and INAF/OAR), M. Feroci (INAF/IAPS), E. Costa (ASI), A. Trois (INAF/OA-Cagliari), G. Piano (INAF/IAPS), M. Pilia (INAF/OA-Cagliari), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Ursi (INAF/IAPS), M. Cardillo, A. Bulgarelli (INAF/IASF-Bo), C. Pittori (SSDC and INAF/OAR), N. Parmiggiani (INAF/IASF-Bo), I. Donnarumma (ASI), A. Giuliani (INAF/IASF-Mi), F. Lucarelli (ASDC and INAF/OAR), G. Minervini (INAF/IAPS), F. Longo (Univ. Trieste and INFN Trieste), F. Fuschino (INAF/IASF-Bo), M. Marisaldi (INAF/IASF-Bo and Bergen University), A. Argan (INAF/IAPS), V. Fioretti (INAF/IASF-Bo), report on behalf of the AGILE Team: In response to the LIGO/Virgo GW trigger G296853 (GCN #21431, T0=2017-08-09 08:28:21.747 UTC) we analyzed the AGILE/Super-AGILE (SA) photon-by-photon data obtaining no significant detection in the 20-60 keV light curve for the interval T0 +/- 100s with different bin sizes (from 0.05 s to 16 s). The Super-AGILE FoV covered about 20% of the LIGO 90% localization region, observed at off-axis angles between 10 and 35 deg. A 3-sigma upper-limit (UL) in the 20-60 keV energy band has been derived for an integration time of 1 s, and varies between 2.2 x 10^-8 erg cm^-2 for 10° off-axis position to 7.0 x10^-8 erg cm^-2 at 30° off-axis position. These measurements were obtained with AGILE observing a large portion of the sky in spinning mode. Additional analysis of SuperAGILE data is in progress. This message may be cited.