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New aperture photometry for 217 galaxies in the Virgo and Fornax clusters. We present photo electric multi-aperture photometry in UBVRI of 171 and46 galaxies in the Virgo and Fornax clusters, respectively. Many of thegalaxies have not been observed in at least one of these passbandsbefore. We discuss the reduction and transformation into the Cousinsphotometric system as well as the extinction coefficients obtainedbetween 1990 and 1993.
| A homogeneous catalog of new UBV and H-beta photometry of B- and A-type stars in and around the Scorpius-Centaurus OB association B- and A-type stars in and near the Sco-Cen OB association areinvestigated with UBV and H-beta photometry to acquire data relevant tothe luminosity function of Sco-Cen. The measurements generally consistof two 10-s integrations of U, B, V, (W, N) filters, and theobservations are corrected iteratively for atmospheric extinction andinstrumental response. The data presented give the mean V magnitude,mean B-V, mean U-B, and the estimated uncertainties for these values.The catalog provides a homogeneous catalog of data for a large fieldwith stellar objects delineating membership to the association Sco-Cenand that affect the luminosity function of the aggregate.
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| Standard magnitudes in the E regions. Not Available
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Osservazione e dati astrometrici
Costellazione: | Lupo |
Ascensione retta: | 14h44m59.93s |
Declinazione: | -44°39'54.1" |
Magnitudine apparente: | 7.517 |
Distanza: | 143.062 parsec |
Moto proprio RA: | 15.4 |
Moto proprio Dec: | -16.8 |
B-T magnitude: | 8.67 |
V-T magnitude: | 7.613 |
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