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Blocking Filters

The following table gives wavelength ranges of the order-sorting filters in NIRI that are used with the grisms. The Gemini identification number for each filter is recorded in data file headers.

Waveband Central Wavelength (microns) Bandpass (microns) Gemini ID Order-sorting filter transmission plot available Order-sorting filter transmission data available
J 1.30 0.97-1.63 G0209 yes yes
H 1.69 1.30-2.09 G0210 yes yes
K 2.20 1.90-2.49 G0211 yes yes
L 3.50 2.90-4.25 G0212 yes yes
M 5.00 4.40-6.00 G0213 yes no

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