The hydrogen white dwarfs (see list below) cover a wide range in effective temperature and the FOS spectrophotometry agrees with the model fluxes to within 2% over the whole UV-visible range. In addition, the simulated B and V magnitudes of the data agree to better than 1% with Landolt photometry. Bohlin et al. (1995) recommend these four White Dwarf standards as primary reference standards for all UV and optical calibrations from 1000 to >10000A.
The data are stored as flux values (ergs/cm/cm/s/A). They have also
been converted to ABMAG using the formula
ABMAG = -2.5 alog10(Fnu) - 48.59
(Hamuy et al., PASP, 104, 533, 1992), where Fnu is in ergs/cm/cm/s/Hz.
WD Primary Standard Stars Star RA (J2000) Dec B-V V Type Teff Log g d m s d ' '' (K) ------------------------------------------------------------------- G191-B2B 05 05 30.6 +52 49 54 -0.326 11.781 DA0 61300 7.50 GD 71 05 52 27.5 +15 53 17 -0.249 13.032 DA1 32300 7.73 GD 153 12 57 02.4 +22 01 56 -0.286 13.346 DA1 38500 7.67 HZ 43 13 16 22.0 +29 05 57 -0.302 12.914 DA1 50000 8.00