The ultraviolet calibration of the Hubble Space Telescope. IV - Absolute IUE fluxes of Hubble Space Telescope standard stars

Details The ultraviolet calibration of the Hubble Space Telescope. IV - Absolute IUE fluxes of Hubble Space Telescope standard stars The ultraviolet calibration of the Hubble Space Telescope. IV - Absolute IUE fluxes of Hubble Space Telescope standard stars

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apjs...73..413b&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 73, July 1990, p. 413-439.

Astronomy and Astrophysics

Astrophysics

95

Hubble Space Telescope, Instrument Compensation, Iue, Reference Stars, Ultraviolet Spectra, White Dwarf Stars, Radiation Distribution, Spectrophotometry, Stellar Atmospheres, Ultraviolet Photometry

Scientific paper

UV fluxes are presented for 37 stars selected as calibration standards for the Hubble Space Telescope (HST). In order to provide data of maximum precision, new absolute calibrations have been derived for the IUE SWP and LWR cameras for point sources in the large apertures, while the sensitivities of the trail and small aperture observing modes relative to the large apertures are updated for all three IUE cameras. More than 2700 individual spectra are used to define the absolute flux distributions of the 37 HST standard stars in the wavelength range 1150-3300 A. A comparison with white dwarf model atmosphere calculations suggests that the systematic external errors in the fluxes are less than 15 percent, while comparison with ANS flux measurements demonstrates an internal consistency of the IUE spectrophotometry of 2 percent, over a dynamic range of 10,000, in bandpasses of 100 A or greater.

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