ElectronCanonLegendsInfinitiesGalen Walton Erso viewed the result of electron diffraction experiments. AppearancesCatalyst: A Rogue One Novel (First mentioned) (Unknown)Unknown UnknownNoneCatalyst: A Rogue One Novel audiobook (Mentioned only) (Unknown)Unknown UnknownNoneShadow of the Sith (Mentioned only) (Unknown)Unknown UnknownNoneShadow of the Sith audiobook (Mentioned only) (Unknown)Unknown UnknownNone