Absolute flux distribution of the sdss standard BD +17°4708

R. C. Bohlin, Ronald Lynn Gilliland

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Secondary flux standards are established by measuring their brightness relative to primary standard stars. The Hubble Space Telescope (HST) primary standards are the three pure-hydrogen white dwarf (WD) flux standards that determine the sensitivity calibration for the Space Telescope Imaging Spectrograph. STIS observations have defined the flux of the Sloan Digital Sky Survey (SDSS) standard BD +17°4708 from 0.17 to 1.0 μm with an uncertainty of less than 0.5% relative to the HST primary standards, as verified by two independent sets of photometry. The two CCD cameras, HRC and WFC, in the ACS instrument package on HST confirm the average ratio of BD +17°4708 to the three fainter WD primary standards to better than 0.5% if a few of the ACS filter bandpasses have small wavelength shifts. With an uncertainty of less than 0.5% in the transfer of the flux calibration from the primary standards, the accuracy of the BD +17°4708 relative flux distribution is essentially the same as that of the primary WDs, that is, ∼2% in the relative fluxes over the 0.17-1 μm range. Our flux distribution agrees with the SDSS fluxes to within their quoted 3% uncertainty.

Original languageEnglish (US)
Pages (from-to)3053-3060
Number of pages8
JournalAstronomical Journal
Volume128
Issue number6
DOIs
StatePublished - Dec 1 2004

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Hubble Space Telescope
calibration
instrument packages
distribution
bandpass filters
CCD cameras
hydrogen
filter
spectrographs
wavelength
photometry
brightness
telescopes
stars
sensitivity
shift
wavelengths
measuring

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Bohlin, R. C. ; Gilliland, Ronald Lynn. / Absolute flux distribution of the sdss standard BD +17°4708. In: Astronomical Journal. 2004 ; Vol. 128, No. 6. pp. 3053-3060.
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Absolute flux distribution of the sdss standard BD +17°4708. / Bohlin, R. C.; Gilliland, Ronald Lynn.

In: Astronomical Journal, Vol. 128, No. 6, 01.12.2004, p. 3053-3060.

Research output: Contribution to journalArticle

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