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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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Osservazione e dati astrometrici
| Costellazione: | Ercole |
| Ascensione retta: | 15h52m14.55s |
| Declinazione: | +44°12'39.5" |
| Magnitudine apparente: | 9.79 |
| Moto proprio RA: | -3.7 |
| Moto proprio Dec: | -11.1 |
| B-T magnitude: | 11.334 |
| V-T magnitude: | 9.918 |
Cataloghi e designazioni:
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