FAINT UBVRI STANDARD STAR FIELDS at +50° DECLINATION
Precise and accurate CCD-based UBVRI photometry is presented for ∼2000 stars distributed around the sky in a declination zone centered approximately at +50°. Their photometry has been calibrated to the standard Johnson UBV and Kron-Cousins RI systems through observations of the UBVRI standard stars presented in the various works of Landolt. The magnitude and color range for these stars are 12 ≲ V ≲ 22 and -0.3 ≲ (B - V) ≲ 1.8, respectively. Each star averages 13 measures in each UBVRI filter from data taken on 41 different photometric nights obtained over a 21 month period. Hence, there now exists a network of faint UBVRI photometric standard stars centered on the declination zones δ = -50°, 0°, and +50°.
Publication Source (Journal or Book title)
Clem, J., & Landolt, A. (2016). FAINT UBVRI STANDARD STAR FIELDS at +50° DECLINATION. Astronomical Journal, 152 (4) https://doi.org/10.3847/0004-6256/152/4/91