Absolute flux calibration of optical spectrophotometric standard stars

Astronomy and Astrophysics – Astronomy

Scientific paper

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47

Calibrating, Light (Visible Radiation), Reference Stars, Standards, Stellar Spectra, Stellar Spectrophotometry, Visible Spectrum, Charge Coupled Devices, Faint Object Camera, Hubble Space Telescope, Photometers, Spaceborne Astronomy, Spectrographs

Scientific paper

A method based on Landolt photometry in B and V is developed to correct for a wavelength independent offset of the absolute flux level of optical spectrophotometric standards. The method is based on synthetic photometry techniques in B and V and is accurate to approximately 1%. The correction method is verified by Hubble Space Telescope Faint Object Spectrograph absolute fluxes for five calibration stars, which agree with Landolt photometry to 0.5% in B and V.

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