GH $\alpha$ FaS : Galaxy H-alpha Fabry-Perot System for the WHT

O. Hernandez, K. Fathi, C. Carignan +11

GH$\alpha$FaS a new Fabry-Perot system, is now available at the William Herschel Telescope. It was mounted, for the first time, at the Nasmyth focus of the 4.2 meter WHT on La Palma in…