Filter Information

Plots and data included with most lists.

Instructions for Fast Beam Simulations

Glass Filter Spectral Transmission Curves from Schott Catalog (reproduced with permission from Schott Glass Technologies, Inc.)

Filter Loan Request Form - PDF fill-in form (if using Adobe Reader).   Or, use the MS-Word version.
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NOIRLab Filter Database

Filter FWHM (Å) CWL (Å) Telescope Instrument Plot Data Comments
C Wash 1042.00 3996.00 WIYN 3.5-meter Telescope Hydra SIZE: 3x3-8.11mm.
C Wash 1042.00 3996.00 WIYN 3.5-meter Telescope Hydra SIZE: 3x3-8.11mm.
C Wash 3996/1042 1042.00 3996.00 SMARTS Consortium: 0.9-meter Telescope BLANK C Wash 3996/1042 Size: 3x3 Thick: 8.11
C Wash 4000/1030 1030.00 4000.00 SMARTS Consortium: 0.9-meter Telescope BLANK C Wash 4000/1030 Size: 4x4 Thick: 8.45
C Washington c6029 1075.00 3850.00 Nicholas U. Mayall 4-meter Telescope Mosaic
C Washington k1006 1034.00 3860.00 Nicholas U. Mayall 4-meter Telescope Mosaic C Washington k1006 C Washington k1006 Note that there is a shift in central wavelength when placed in different f/ratio beams. At the KPNO 4meter f/3.1 beam this corresponds to a shift of approximately 12 Angstroms bluer; at the CTIO 4meter f/2.9 this corresponds to a shift of approximately 15 Angstroms bluer; at the WIYN 0.9m f/7.9 this corresponds to a shift of approximately 5 Angstroms bluer. See the plot at the bottom of the page.
C Washington k1006 Nicholas U. Mayall 4-meter Telescope Mosaic C Washington k1006 C Washington k1006 Below is a plot of the transmission of this filter when used at telescopes with differing focal ratios and central obscurations; the KPNO 4m (f/3.1), the CTIO 4m (f/2.9), and the WIYN 0.9m (f/7.9). At the KPNO 4m f/3.1 the properties of this filter are: CWL=3892A, FWHM=1030A, PEAK TRANSMISSION=77.4%.
Ca 96.00 3972.00 WIYN 0.9-meter Telescope S2KB Ca Ca 01-2013
Ca H&K line filter WIYN 3.5-meter Telescope Hydra Ca H&K line filter Ca H&K line filter SIZE: 4x4
Ca H&K line filter WIYN 3.5-meter Telescope Hydra Ca H&K line filter Ca H&K line filter SIZE: 4x4
Ca H&K line filter 3960/100 SMARTS Consortium: 0.9-meter Telescope BLANK Size: 4x4
CaT_G0309 1525.00 8600.00 Gemini North GMOS-N CaT_G0309 CaT_G0309
CaT_G0333 1525.00 8600.00 Gemini South GMOS-S CaT_G0333 CaT_G0333
CH4ICE 1508.00 22750.00 Gemini North NIRI CH4ICE CH4ICE
CH4LONG 1172.00 16900.00 Gemini North NIRI CH4LONG CH4LONG
CH4long_G1110 1057.00 16900.00 Gemini South GSAOI CH4long_G1110 CH4long_G1110
CH4SHORT 1151.00 15800.00 Gemini North NIRI CH4SHORT CH4SHORT
CH4short_G1109 919.00 15800.00 Gemini South GSAOI CH4short_G1109 CH4short_G1109
CN 168.00 1107.00 WIYN 3.5-meter Telescope WHIRC CN The Pa β 45 and CO-n filters were removed from WHIRC in January 2012 and replaced by the CN and CO-w filters.
CO 710.00 23310.00 SOAR Telescope SPARTAN IR Width [km/s]: 9100. Note that SPARTAN filters are permanently mounted in the instrument, and therefore are always available and need not be specified in Instrument Setup forms.
CO-n 228.00 2293.00 WIYN 3.5-meter Telescope WHIRC CO-n The Pa β 45 and CO-n filters were removed from WHIRC in January 2012 and replaced by the CN and CO-w filters.
CO-w 103.00 2342.00 WIYN 3.5-meter Telescope WHIRC CO-w The Pa β 45 and CO-n filters were removed from WHIRC in January 2012 and replaced by the CN and CO-w filters.
CO20 330.00 22890.00 Gemini North NIRI CO20 CO20
CO2360_G1124 788.00 23600.00 Gemini South GSAOI CO2360_G1124 CO2360_G1124
cont_1 320.00 20400.00 SOAR Telescope SPARTAN IR Width [km/s]: 4660. Note that SPARTAN filters are permanently mounted in the instrument, and therefore are always available and need not be specified in Instrument Setup forms.
cont_2 300.00 21400.00 SOAR Telescope SPARTAN IR Width [km/s]: 4260. Note that SPARTAN filters are permanently mounted in the instrument, and therefore are always available and need not be specified in Instrument Setup forms.
cont_3 320.00 22080.00 SOAR Telescope SPARTAN IR Width [km/s]: 4310. Note that SPARTAN filters are permanently mounted in the instrument, and therefore are always available and need not be specified in Instrument Setup forms.
Cont-203 20336.00 Víctor M. Blanco 4-meter Telescope ISPI ISPI Narrow Band Filters. Wavelengths @80% (micron): 2,062 - 2,0400
Continuum, 2.14 mu 21462.00 Víctor M. Blanco 4-meter Telescope ISPI ISPI Narrow Band Filters. Wavelengths @80% (micron): 2,1385 - 2,1532
CuS04 Crystal 0.00 0.00 KPNO 2.1-meter Telescope GoldCam CuS04 Crystal CuS04 Crystal Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
CUSO4 liq 0.00 0.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter
CUSO4 liq 0.00 0.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter
D51 DDO 51 c6008 154.00 5130.00 Nicholas U. Mayall 4-meter Telescope Mosaic D51 DDO 51 c6008 D51 DDO 51 c6008 Note: The central wavelength of CTIO Mosaic narrow band filters (actually all filters, but is very significant for narrow band filters) is shifted ~15A to the BLUE in the f/2.87 beam of the Blanco 4m + PFADC corrector as compared to the transmission measured in parallel light. The central wavelength quoted below is nominally for when the filter is used at PF, with the ~15A shift included. Furthermore, the filter transmission curve presented below shows the simulated filter transmission curve for the Blanco 4m + PFADC f/2.87 beam.
D51 DDO 51 k1008 162.90 5145.20 Nicholas U. Mayall 4-meter Telescope Mosaic D51 DDO 51 k1008 D51 DDO 51 k1008 Note that there is a shift in central wavelength when placed in different f/ratio beams. At the KPNO 4meter f/3.1 beam this corresponds to a shift of approximately 12 Angstroms bluer; at the CTIO 4meter f/2.9 this corresponds to a shift of approximately 15 Angstroms bluer; at the WIYN 0.9m f/7.9 this corresponds to a shift of approximately 5 Angstroms bluer. See the plot at the bottom of the page.
D51 DDO 51 k1008 Nicholas U. Mayall 4-meter Telescope Mosaic D51 DDO 51 k1008 D51 DDO 51 k1008 Below is a plot of this filter as simulated in different f/ratio beams.At the KPNO 4m f/3.1 the properties of this filter are: CWL=5132A FWHM=161A PEAK TRANSMISSION=85.1%
DDO 51 Wash. set 133.00 5121.00 WIYN 3.5-meter Telescope Hydra DDO 51 Wash. set DDO 51 Wash. set SIZE: 4x4-7.76mm.
DDO 51 Wash. set 133.00 5121.00 WIYN 3.5-meter Telescope Hydra DDO 51 Wash. set DDO 51 Wash. set SIZE: 4x4-7.76mm.
DDO 51 Wash. set 5130/155 133.00 5121.00 SMARTS Consortium: 0.9-meter Telescope BLANK DDO 51 Wash. set 5130/155 Size: 4x4 Thick: 7.76
DECam g 1003.70 4770.80 Víctor M. Blanco 4-meter Telescope Dark Energy Camera DECam g DECam g
DECam i 1281.00 7774.20 Víctor M. Blanco 4-meter Telescope Dark Energy Camera DECam i DECam i
DECam N662 170.00 6622.40 Víctor M. Blanco 4-meter Telescope Dark Energy Camera DECam N662
DECam N964 95.00 9640.00 Víctor M. Blanco 4-meter Telescope Dark Energy Camera DECam N964
DECam r 1276.20 6371.30 Víctor M. Blanco 4-meter Telescope Dark Energy Camera DECam r DECam r
DECam Y 674.50 9886.30 Víctor M. Blanco 4-meter Telescope Dark Energy Camera DECam Y DECam Y
DECam z 1289.30 9157.90 Víctor M. Blanco 4-meter Telescope Dark Energy Camera DECam z DECam z
DS920_G0312 190.00 9200.00 Gemini North GMOS-N DS920_G0312 DS920_G0312
EO_466 440.00 4670.00 Gemini South ZORRO EO_466 EO_466 not convolved with dichroic
EO_466 440.00 4670.00 Gemini North ALOPEKE EO_466 EO_466 not convolved with dichroic
EO_562 437.00 5622.00 Gemini South ZORRO EO_562 EO_562 not convolved with dichroic
EO_562 437.00 5622.00 Gemini North ALOPEKE EO_562 EO_562 not convolved with dichroic