Suppressed Far-UV Stellar Activity and Low Planetary Mass Loss in the WASP-18 System

NASA [NAS 5-26555, NAG5-13058]; NASA through Space Telescope Science Institute [13859]; STScI [HST-AR-10638.01-A]; ESO Telescopes at the La Silla Paranal Observatory [092.D-0587]; STFC [ST/P000584/1]; INAF; ASI through the ARIEL consortium