Three-Color Observations of 108 Stars Intended for Use as Photometric Standards.

Abstract

Three-color observations on the (U, B, V) system have been made for 108 stars, including the 10 primary standards. These observations, which are of relatively high weight, are intended, along with the three standard regions-Praesepe, the Pleiades, and IC 4665-for use as standards for the threecolor photometric system.