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Strömgren photometric system

(uvby System, uvby Photometric System)
(four-color photometric system devised in 1950s)

The Strömgren photometric system is a four-passband photometric system devised by astronomer Bengt Strömgren. It is considered a medium-band photometric system, using narrower bands but covering the same general range as the UBV photometric system, covering visible light and some ultraviolet.

Filters:

Designator Stands for peak
wavelength
full width at half maximum
u "ultraviolet" 350nm 30nm
v "violet" 411nm 19nm
b "blue" 467nm 18nm
y "yellow(?)" 547nm 23nm

Since its development, additions have been devised.


(EMR,color,magnitude,photometry)
http://en.wikipedia.org/wiki/Strömgren_photometric_system

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