Sabatini, S.S.SabatiniStriani, E.E.StrianiVerrecchia, FrancescoFrancescoVerrecchiaPittori, CarlottaCarlottaPittoriLucarelli, FabrizioFabrizioLucarelliSantolamazza, P.P.SantolamazzaColafrancesco, SergioSergioColafrancescoGiommi, PaoloPaoloGiommi2020-09-172020-09-172010-07-01https://hdl.handle.net/20.500.13025/1705The Astronomer's Telegram, #2715Following the MAXI/GSC detection of a new soft X-ray brightening in Cygnus X-1 (ATel #2711) and the subsequent X-ray increased emission reported by RXTE-ASM (ATel #2714), indicating a possible transition of the source to the soft spectral state, we carried out follow up analysis for gamma-ray emission in AGILE data. Integrating from 2010-06-30 10 00 UT to 2010-07-02 10 00 UT, a maximum likelihood analysis yields a flux excess above 100 x 10-8 ph/cm2/s (E > 100 MeV) in a position consistent with the black hole binary Cygnus X-1.Gamma RayBinariesBlack HolesTransientshttp://adsabs.harvard.edu/abs/2010ATel.2715....1S2010ATel.2715....1S