Improved UBVRCIC to u'g'r'i'z' Transformation Equations: Updated Main Sequence and Giant Star Relations

Astronomy and Astrophysics – Astronomy

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Scientific paper

Rodgers et al. (2006) began a study on the UBVR_CI_C to $u'g'r'i'z'$ transformation equations by separating each equation by luminosity class. This study was limited in number and color coverage by use of the Smith et al. (2002) and Landolt (1992) standard stars with known luminosities in both photometric systems. We have expanded this data set by observing bright stars with known luminosities and metallicities in both photometric systems. We give updated equations for Main Sequence (luminosity class V) stars and preliminary equations for Giant (luminosity class III) stars. We also investigate if these transformation equations have any metallicity dependencies.

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