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Four-color UVBY and H-beta photometry of high-velocity and metal-poor stars. I - The catalogue of observations
A catalog of four-color uvby and H-beta photometry for 711 high-velocityand metal-poor stars is given. The selection of the stars and theobserving and reduction techniques used to obtain these data arediscussed. The photometry has been transformed closely onto the standarduvby-beta system. The errors of the data have been estimated using bothinternal and external comparisons. The data are uniform over the sky;that is, there are no significant north-south differences. For the largemajority of stars the mean errors of V, m1, c1, and beta are less than +or - 0.008 mag, and the error of b-y is less than + or - 0.005 mag.Values of V, b-y and beta and rough photometric classifications aregiven for 63 red and/or evolved stars that fall outside the range of thephotometric transformations.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Kuzey Taci |
| Sað Açýklýk: | 16h01m44.22s |
| Yükselim: | +30°02'41.0" |
| Görünürdeki Parlaklýk: | 9.796 |
| özdevim Sað Açýklýk: | -12.6 |
| özdevim Yükselim: | -34.9 |
| B-T magnitude: | 10.852 |
| V-T magnitude: | 9.884 |
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