Washington CCD standard fields

Twenty-two new Washington system standards have been established in four fields suitable for observation with a CCD. Each field includes stars with a wide color range sufficiently faint to be observed with large telescopes. The fields are (mostly) equatorial, and spaced approximately every 6 hours in right ascension. All observations were obtained photoelectrically to ensure that they were on the standard system. The mean number of observations per star is 18, and the mean colors and magnitudes are determined to about 0.005 mag. The existence of an extremely red star near the Landolt standard SA 98-682 is noted. In addition, (M-51) observations are presented for 13 traditional CMT 1 T 2 standards that allow their use as standards for this color index as well.