Other
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977pasp...89..323m&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 89, June-July 1977, p. 323-328.
Other
28
Balmer Series, Stellar Spectrophotometry, Ubv Spectra, Electrophotometry, Error Correcting Devices, Interstellar Extinction, Main Sequence Stars
Scientific paper
Methods are presented for eliminating the effect of the Balmer discontinuity in fitting UBV data to the standard nonideal UBV system through a general correlation function that is valid for all spectral types regardless of reddening and is applicable to any program star without information other than the measured UBV values. A reduction method that is linear in color index and air mass is outlined whereby systematic deviations in (U-B) index are obtained as a function of spectral type or color and, after reduction to zero air mass, are correlated unambiguously to a parameter that is a linear combination of (B-V) and (U-B). As an example, the method is applied to a large sample of standard stars, and the mean external error in (U-B) is reduced from 0.05 to 0.02 magnitude. Verification of this method by numerical simulation is demonstrated.
Moffat Anthony F. J.
Vogt Nicolas
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