The UcBV photometric system
Basic Reference
Arp H.C. 1958, AJ 63, 118
Abstract
Aproximately 290 three-color measures on 170 stars in the southern hemisphere
are reported. The measures are of Johnson-Morgan standards, E-region standards,
southern supergiants, and sequences in the Small Magellanic Cloud, Large
Magellanic Cloud and omega Centauri. Magnitudes are given on the B, V system;
the range of brightness is from V = 1 to 13 mag.
The measures were obtained with the 24-inch refracting telescope of the Royal
Observatory. The ultraviolet color indices obtained with that refractor are
calibrated in terms of reddening and luminosity class. Preliminary results on
six Small Magellanic Cloud supergiants are given.
Content
Access to the data and references
Asiago Database on Photometric System (ADPS)
Indices and Parameters
V, B-V, Uc-B
Filters
Uc : 2 mm Corning 9863
B : 2 mm Schott GG13 + 2 mm BG12
V : 2 mm Omag 302
Reddening-free Parameter
Q = (U-Bc) - 0.36 (B-V)
Photomultiplier
EMI
Problems
In the course of a systematic comparison of photometric data, a
number of problems have been found, but could not
be solved. Generally the data associated with a star identification are not
in agreement with those from other systems, usually the UBV system.
Please, send your
commentsto epaunzen@physics.muni.cz
epaunzen@physics.muni.cz
Last update: 21 May 1996