TITLE: GCN CIRCULAR NUMBER: 24942 SUBJECT: LIGO/Virgo S190630ag: No counterpart candidates in AGILE-GRID observations DATE: 19/07/01 16:07:45 GMT FROM: Carlotta Pittori at ASI SSDC, INAF-OAR C. Pittori (SSDC, and INAF/OAR), A. Ursi (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), M. Cardillo, C. Casentini, G. Piano (INAF/IAPS), F. Lucarelli, F. Verrecchia (SSDC, and INAF/OAR), A. Bulgarelli, V. Fioretti, 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 S190630ag at T0 = 2019-06-30 18:52:05.180 UTC a preliminary analysis of the AGILE exposure at T0 shows that the Gamma-Ray Imaging Detector (GRID) exposure covered less than 20% of the 90% c.l. localization region (LR) (due to Earth occultation and Solar Panel constraints). We performed an analysis of the GRID data in the energy range 50 MeV -10 GeV over time intervals before and after T0, where good exposure of the S190630ag 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: from 5.9e-08 to 5.5e-06 erg cm^-2 s^-1, with exposure of about 42% of the LR over the time interval ( T0 -200s ; T0 -100s ). These measurements were obtained with AGILE observing a large portion of the sky in spinning mode. Additional analysis of AGILE data is in progress.