U BV RI photoelectric observations have been made of 335 stars around the sky, and centered approximately at +50 deg declination. The majority of the stars fall in the magnitude range 9 < V < 16, and in the color range -0.3 < (B-V) < +1.8. Those 243 stars best suited as new broadband photometric standard stars average 12.5 measures each from data taken on 98 different nights over a period of 17 years at the Kitt Peak National and Lowell Observatories. © 2013. The American Astronomical Society. All rights reserved.
Publication Source (Journal or Book title)
Landolt, A. (2013). U BV RI photometric standard stars around the SKY at +50 deg declination. Astronomical Journal, 146 (5) https://doi.org/10.1088/0004-6256/146/5/131