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CALSPEC: HST Spectrophotometric Standards at 0.115 to 32 μm with a 1% Accuracy Goal

Published online by Cambridge University Press:  03 March 2020

Ralph C. Bohlin
Ralph C. Bohlin*
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA email: bohlin@stsci.edu
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Abstract

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The flux distributions of spectrophotometric standard stars were initially derived from the comparison of stars to laboratory sources of known flux but are now based on calculated model atmospheres. For example, pure hydrogen white dwarf (WD) models provide the basis for the HST CALSPEC archive of flux standards. There is good evidence that relative fluxes from the visible to the near-IR wavelength of ∼2.5 μm are currently accurate to ∼1% for the primary reference standards.

Keywords

techniques: spectroscopicastronomical data bases: miscellaneousstars: fundamental parameters(stars:) white dwarfs

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