Ýçindekiler
Görüntüler
Resim Yükleyin
DSS Images Other Images
Ýlgili Makaleler
Pulkovo compilation of radial velocities for 35495 stars in a common system.
Not Available
| Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Subtittle: Radial velocities: The Wilson-Evans-Batten catalogue.
We give a common version of the two catalogues of Mean Radial Velocitiesby Wilson (1963) and Evans (1978) to which we have added the catalogueof spectroscopic binary systems (Batten et al. 1989). For each star,when possible, we give: 1) an acronym to enter SIMBAD (Set ofIdentifications Measurements and Bibliography for Astronomical Data) ofthe CDS (Centre de Donnees Astronomiques de Strasbourg). 2) the numberHIC of the HIPPARCOS catalogue (Turon 1992). 3) the CCDM number(Catalogue des Composantes des etoiles Doubles et Multiples) byDommanget & Nys (1994). For the cluster stars, a precise study hasbeen done, on the identificator numbers. Numerous remarks point out theproblems we have had to deal with.
| 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.
|
Yeni bir Makale Öner
Ýlgili Baðlantýlar
Yeni Bir Baðlantý Öner
sonraki gruplarýn üyesi:
|
Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Kova |
| Sað Açýklýk: | 22h16m00.69s |
| Yükselim: | -14°26'09.5" |
| Görünürdeki Parlaklýk: | 7.877 |
| Uzaklýk: | 343.643 parsek |
| özdevim Sað Açýklýk: | 4.4 |
| özdevim Yükselim: | -0.7 |
| B-T magnitude: | 9.482 |
| V-T magnitude: | 8.01 |
Kataloglar ve belirtme:
|
