Red and Infrared Magnitudes for 138 Stars Observed as Photometric Standards.

This is the authors' abstract. We don't add key points for this paper.

Red and infrared magnitudes were determined photoelectrically for 138 stars, some groups in a uniformly distributed series of Harvard Standard C and D regions and others at random in declination approximately - 15 to $15 . The C and D region stars may be used for magnitude zero-point standards and for limited-range color standards. The randomly distributed individual stars were picked to represent an extremely wide color range, for use in color standardization on photometric programs requiring wide, stable color ranges. All the stars are situated in the sky so that they can be observed with precision from a large percentage of all the observatories in both hemispheres. Every effort was made to reduce the systematic and random errors to as small a size as practicable.