STELES: the high-resolution Échelle spectrograph for the 4.1-m SOAR Telescope
The SOAR Telescope Echelle Spectrograph (STELES) is a high-resolution, near-UV/optical spectrograph for the 4.1 m SOAR Telescope. STELES is a Nasmyth-fed, dual-channel (blue/red), VPH cross-dispersed echelle spectrograph operating in quasi-Littrow white-pupil configuration. The instrument provides simultaneous waveleng...