Piano, G.G.PianoPittori, CarlottaCarlottaPittoriLucarelli, FabrizioFabrizioLucarelliVerrecchia, FrancescoFrancescoVerrecchiaPicozza, P.P.PicozzaAntonelli, A.A.AntonelliGiommi, PaoloPaoloGiommi2020-09-172020-09-172017-06-01https://hdl.handle.net/20.500.13025/5143The Astronomer's Telegram, No. 10469AGILE is revealing enhanced gamma-ray activity above 100 MeV from a source positionally consistent with BL Lacertae (HB89 2200+420, z=0.0686). Integrating between 2017-06-04 UT 04 00 00 and 2017-06-06 UT 04 00 00, a preliminary multi-source likelihood analysis detects a gamma-ray flux F( > 100 MeV) = (3.5 +/- 1.0) x 10^-6 photons/cm^2/s with a significance greater than 5 sigma.Request for ObservationsAGNBlack HoleBlazarTransientletterhttp://adsabs.harvard.edu/abs/2017ATel10469....1P2017ATel10469....1P