PHOTOELECTRIC UVBY-BETA PHOTOMETRY OF 230 STARS BRIGHTER THAN MPG=13.0 IN THE 2 B=-DEGREES FIELDS SA-80 AND SA-81(75)

uvby and beta photometry for 123 and 107 stars in SA 80 and SA 81 brig hter than m(pg) = 13 and earlier than G1 are presented. Most stars see m to be of type A or F with sample limits V less-than-or-equal-to 12.6 and beta greater-than-or-equal-to 2.60. SA 80 and SA 81 has 34 and 27 BD stars in common to a general b greater-than-or-equal-to 70-degrees program, respectively. For the two fields the mean differences in V, b - y, m1, c1, beta are 2.5, 1.9, -1.0, -10.4, -4.6 and 11.0, -0.9, 5. 4, -5.3, -5.7 (0.001m) respectively. uvby photometry for 19 and 12 sta rs fainter than m(pg) = 13 is also presented. If situated on the stand ard line the sample of absolutely less luminous F9-GO stars are comple te in the volume confined to the distance range from 80 to 300-400 pc. m1 - (b - y) diagrams indicate that several extreme population II sta rs, many intermediate population II stars, horizontal branch stars and sd-FG stars are included in the sample. Interestingly enough the 24.5 square degrees surveyed includes 10 A star and one B star candidates with V magnitudes ranging from 8.5 to 12.9. Reddening seems two be sli ghtly different in the two regions. Several lines of sight have E(b - y) exceeding 0.050m. In both areas the remote A stars seem to be virtu ally unreddened or are perhaps bluer than typical for population I sta rs. SA 80 covers part of the Virgo cluster and the data may be used to estimate the galactic reddening in this direction.