Photoelectric UBV Observations made on the Palomar 20-Inch Telescope

This paper presents the results of 762 UBV observations of 203 stars made between 1969 December and 1971 September mostly on the 20-in. telescope on Palomar Mountain. Nearly all stars are brighter than $$V\sim 13^\text {m.}0$$ . The results are given under the programme headings as follows: 1. A stars in the North Galactic Cap. Ninety-two stars classified as A0 or A2 for which radial velocity observations are available. 2. Interesting blue stars. Mostly hot stars observed spectroscopically by Greenstein. 3. Twenty-three F or G dwarfs from the Bright Star Catalogue . 4. Four stars from the Catalogue of Nearby Stars . Previous photometry of these stars had placed them among the giants in the ( U – B )/( B – V ) diagram although their spectra and parallaxes suggested that they were dwarfs. 5. Stars proposed as faint standards by Peterson. 6. Variable stars. Miscellaneous observations of six RR Lyrae variables (SW And, XX And, XZ Dra, TT Lyn, AV Peg and CG Peg) and one star suspected of being non-variable (AT Her). 7. Miscellaneous stars.