The r, r8, r9, i photometric system
Basic Reference
Argue A.N. 1967, MNRAS 135, 23
Abstract
Red and infra-red magnitudes and colours for about 300 F, G and K type stars
were measured at Kitt Peak National Observatory, Arizona. The photometer
consisted of a 16 in. (40 cm) Cassegrain reflector, an RCA 7102 photomultiplier
and the following filters: a lambda = 6900A interference filter (r), a Schott
RG8 optical glass, a Schott RG9 and a lambda = 1.00 mu interferences filter
(i). The natural r, (r-rg8) and (r-rg9) scales show good agreement with the R
and (R-I) scales of Kron et al. for the F, G and K type stars but not for
earlier types. The standard error for a simple difference from Kron, excluding
the early types, is 0.022 in r, 0.015 in (r-rg8) and 0.016 in (r-rg9).
There is also good agreement between (r-i) and the (R-I) of Arizona Tonantzintla
after a linear transformation has been applied to (r-i). Again types earlier
than F have to be excluded, and the standard error of a simple difference then
is 0.018.
Content
Access to the data and reference
Asiago Database on Photometric System (ADPS)
Indices and Parameters
r-rg8, r-rg9, r, r-i
Filters
r : Interference
rg8 : 2 mm Schott RG8
rg9 : 2 mm Schott RG9
i : Interference
Photomultiplier
RCA 7102
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commentsto epaunzen@physics.muni.cz
epaunzen@physics.muni.cz
Last update: 21 May 1996