This narrow-band filter was designed and purchased by Tammy Smecker-Hane for use with DEIMOS and is available for community use.

Filter Parameters

Property	Value	Notes
Peak transmission	~100%	Uncertain by about 5%
Pivot wavelength	8560.3 Å	Using method from Tokunaga & Vacca 2005
Passband Width	269.4 Å	Equivalent width of the rectangle having the same area as the total area under the normalized transmission curve.

Transmission Curve

Because of the fast optical beam at the location of the filter, it is possible that the central wavelength will vary as a function of position on the detector for this filter (as is also the case with any interference filter used in DEIMOS).