UVES The Ultraviolet & Visible Echelle Spectrograph John Pritchard ESO p2pp3 Workshop: UVES Overview | | John Pritchard

Overview 2 nd oldest instrument on the VLT ( commissioned 1999), but still one of the most demanded Cross-dispersed Echelle spectrograph Nasmyth Platform B of VLT UT2 (Kueyen) 300 to 1,000 nm BLUE and RED arms used independently or simultaneously using one of two dichoics Max resolution (2pix) 80,000 & 110,000 (blue/red arms respectively) slit width 0.4”, R~40,000 with 1.0” slit Image slicers for higher resolutions with ‘wider’ slits Slit widths up to 10” (flux calibration) UVES The Ultraviolet & Visible Echelle Spectrograph

Features Magnitude limits: ~18/19 (blue/red) continuum source, 0.7 arcsec seeing, 1 arcsec slit, no binning, 3-hour integration time, S/N of 10 (per resolution element) at the peak of the central order, no moon. Complete (almost) wavelength coverage from 300 to 1,060 nm in two DICHROIC settings DIC1 ( ) + DIC2 ( ) Radial velocity precision ~50m/s Attached wavelength calibrations Iodine absorption cell Simultaneous ThAr method (FLAMES/UVES 7+1 MOS mode) Long slit, single order, mode (VM only) UVES The Ultraviolet & Visible Echelle Spectrograph ESO p2pp3 Workshop: UVES Overview | | John Pritchard

p2pp and OBs 4 instrument modes: BLUE, RED, DIC#1 & DIC#2 Obs can NOT mix modes (except in RRM) Standard setups (central wavelengths) vs. “complete” freedom Attached calibrations UVES The Ultraviolet & Visible Echelle Spectrograph ESO p2pp3 Workshop: UVES Overview | | John Pritchard

Summary General purpose, high resolution, high efficiency, wide wavelength coverage, spectroscopic workhorse UVES The Ultraviolet & Visible Echelle Spectrograph ESO p2pp3 Workshop: UVES Overview | | John Pritchard