Datatype: VRIk

For historical reasons, the VRI photometry has produced several systems which have quite similar, but the V-R and R-I indices are not exactly in the same standard system. Therefore a datatype has been attributed to each realisation of the VRI filter combination.

The datatype vrik refers to the VRI photoelectric photometry in the system of Kron.

The BV colours are stored with the ubv data.

Record structure

No:Star number
Ref:Data source
V:V magnitude
V-R:V-R colour index
R-I:R-I colour index

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Last Update: 17 February 1998