II. Band and reddening parameters
Indices and Parameters
Ralpha = (B / BL) / (A / AL)
where B and A are the output for the side band and Halpha, and BL and AL
the corresponding fluxes for the lamp.
The integrated light intensity within a band defined by the wavelength limits
6545-6580 Å. centered on Halpha was measured on one photomultiplier (A).
The combined integrated light-intensity within the two comparison regions
defined repsectively by the wavelength limits 6477.5 to 6495.0 Å and
6630.0 to 6647.5 Å was measured by a second photomultiplier (B).
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Last update: 21 May 1996