Buson, S.S.BusonGasparrini, DarioDarioGasparrini2020-09-172020-09-172016-03-01https://hdl.handle.net/20.500.13025/4679The Astronomer's Telegram, No. 8812The Large Area Telescope (LAT), one of the two instruments on the Fermi Gamma-ray Space Telescope, has observed increasing gamma-ray flux and an unusually hard gamma-ray spectrum from a source positionally consistent with the flat spectrum radio quasar (FSRQ) S4 1800+44 (also known as 3FGL J1801.5+4403, Acero et al. 2015, ApJS, 218, 23) with radio counterpart coordinates (J2000.0), R.A. = 270.3846454 deg, Dec. = 44.0727500 deg (Johnston et al. 1995, AJ, 110, 880).Request for ObservationsAGNBlazarTransienthttp://adsabs.harvard.edu/abs/2016ATel.8812....1G2016ATel.8812....1G