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Pulkovo compilation of radial velocities for 35495 stars in a common system. Not Available
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| CCD uvbyβ photometry of faint stars. I. Observations and reductions. An observational programme involving simultaneous CCD- and photoelectricuvbyβ photometry has been carried out using the two Danishtelescopes at La Silla. In order to derive reliable astrophysicalparameters for F dwarfs at distances of several kpc final accuraciesbetter than 0.015mag for each magnitude are needed for faint stars. Highaccuracy requires careful preprocessing and data handling and therequested accuracy is now obtained for stars as faint as V=~18mag usingthe procedure described in this paper. A common robust CCD instrumentalsystem is established and the subsequent transformation to the standardsystem is performed using a set of faint secondary standards observed inthe photoelectric programme. Photoelectric photometry for a number ofcalibration stars in the CCD frames is also published. These stars haveup to 11 observations each and may be included in the preliminary sampleof secondary standards that has emerged from the combined programme.
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Dades d'Observació i Astrometria
Constel·lació: | Aquarius |
Ascensió Recta: | 22h16m00.69s |
Declinació: | -14°26'09.5" |
Magnitud Aparent: | 7.877 |
Distancia: | 343.643 parsecs |
Moviment propi RA: | 4.4 |
Moviment propi Dec: | -0.7 |
B-T magnitude: | 9.482 |
V-T magnitude: | 8.01 |
Catàlegs i designacions:
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