The Zinn photometric system
Basic Reference
Zinn R. 1980, Astrophys. J. Suppl. 42, 19
Abstract
Photoelectric photometry of the integrated light of globular clusters in
selected filter passbands has been used to derive estimates of their
interstellar reddening and metal abundances (i.e., [Fe/H]). The
uncertainties in these estimates average +-0.03 in E(B-V) and +-0.10 in
[Fe/H}, which are not much larger than the uncertainties in the estimates
derived from the best methods that rely on observations of individual stars
in the clusters. Seventy-nine globular clusters have been observed with our
technique, which brings to 84 the total number of globular clusters with
precise estimates of metal abundance.
Content
Access to the data and references
Asiago Database on Photometric System (ADPS)
Indices and Parameters
g, u-v, v-g, g-r, 39B-g, 39N-g
Filters
Peak
Filter wavelength Width Name
[Å] [Å]
u 3600 380 2 mm Schott BG8 + 4 mm UG11
v 3940 450 3 mm Schott BG38 + 4 mm UG3 + 1 mm BG1 + 1 mm GG13
g 4930 700 3 mm Schott BG38 + 1 mm GG460 + Kodak Wratten 460
r 6550 810 6 mm Schott RG2 + 1 mm BG20
39B 3920 180 interference filter
39N 3950 70 interference filter
Photomultiplier
S20 photocathode
Please, send your
commentsto epaunzen@physics.muni.cz
epaunzen@physics.muni.cz
Last update: 13 September 2002