Southern spectrophotometric standards for large telescopes

Abstract

The authors present spectral energy distributions for 18 stars intended as flux standards for large southern hemisphere telescopes. The monochromatic magnitudes range between 10 and 14.5 and the wavelengths observed are from 3200 to 8280. The authors also present mean narrow-band extinction coefficients for Cerro Tololo over the wavelength range 3200-8370.