The uvgr photometric system

Basic Reference

Thuan T.X., Gunn J.E. 1976, Publ. Astron. Soc. Pacific 88, 543

Abstract

The characteristics of a new four-color uvgr intermediate-band photometric system, which avoids several pitfalls of the standard UBV system, are described. A set of standard stars is given.

Content

Access to the data and references

Asiago Database on Photometric System (ADPS)

Indices and Parameters

g, g-r, u-v, v-g

Filters

u : 1 mm Schott BG38 + 4 mm Schott UG11
Lam_eff : 3530 Å ; Width : 400 Å
v : 3 mm Schott BG38 + 4 mm Schott UG3 + 1 mm Schott BG1 + 1 mm Schott GG13
Lam_eff : 3980 Å ; Width : 400 Å
g : Corion interference filter
Lam_eff : 4930 Å ; Width : 700 Å
r : 3 mm Schott RG16 + Balzers B1 short pass interference filter
Lam_eff : 6550 Å ; Width : 900 Å

Photomultiplier

Standard S20 photocathode
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Jean-Claude.Mermilliod@obs.unige.ch
Last update: 13 September 2002