(band of visible light around 6500 angstroms)
The term R band is often used for a photometric system's
red band, a typical example being centered round
658 nm with a full width at half maximum of 138 nm. R may indicate the band or a
filter adhering to the specification.
The letter is also used to indicate the magnitude of the signal
observed through the filter, e.g., citing "R = 1.5".
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Referenced by pages:
The Survey for Ionization in Neutral Gas Galaxies (SINGG)
UBV photometric system