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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
Washington 51 174.00 5142.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Washington 51 Washington 51 Replaces KP1525
Washington - m 1012.00 5097.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Washington - m Washington - m Corning glass
Washington - c 1046.00 3979.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Washington - c Washington - c Corning glass
Wash set - t1 651.00 6251.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Wash set - t1 Wash set - t1
VR k1039 *** New! 2216.00 5940.00 Nicholas U. Mayall 4-meter Telescope Mosaic VR k1039 *** New! VR k1039 *** New! NOTE: This filter is a replacement for k1040. 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.
VR Bernstein k1040 *** Retired! 2119.56 5944.95 Nicholas U. Mayall 4-meter Telescope Mosaic VR Bernstein k1040 *** Retired! VR Bernstein k1040 *** Retired! NOTE: This filter was damaged in June 2011 and is retired. 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.
VR Bernstein k1040 *** Retired! Nicholas U. Mayall 4-meter Telescope Mosaic VR Bernstein k1040 *** Retired! VR Bernstein k1040 *** Retired! 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=5934A, FWHM=2079A, PEAK TRANSMISSION=95.3%.
V Tek set#2 5438/1026 1026.00 5438.00 SMARTS Consortium: 0.9-meter Telescope BLANK V Tek set#2 5438/1026 Size: 3x3
V Tek set#2 1026.00 5438.00 WIYN 3.5-meter Telescope Hydra V Tek set#2 SIZE: 3x3
V Tek set#2 1026.00 5438.00 WIYN 3.5-meter Telescope Hydra V Tek set#2 SIZE: 3x3
V Tek set #1 5475/1000 1000.00 5475.00 SMARTS Consortium: 0.9-meter Telescope BLANK V Tek set #1 5475/1000 Size: 3x3
V Tek set #1 1000.00 5475.00 WIYN 3.5-meter Telescope Hydra V Tek set #1 SIZE: 3x3
V Tek set #1 1000.00 5475.00 WIYN 3.5-meter Telescope Hydra V Tek set #1 SIZE: 3x3
v Stromgren 4x4 4118/146 146.00 4118.00 SMARTS Consortium: 0.9-meter Telescope BLANK v Stromgren 4x4 4118/146 v Stromgren 4x4 4118/146 Size: 4x4 Thick: 9.87
v Stromgren 4x4 146.00 4118.00 WIYN 3.5-meter Telescope Hydra v Stromgren 4x4 SIZE: 4x4-9.87mm.
v Stromgren 4x4 146.00 4118.00 WIYN 3.5-meter Telescope Hydra v Stromgren 4x4 SIZE: 4x4-9.87mm.
V set#2 Schmidt 5443/1060 SMARTS Consortium: 0.9-meter Telescope BLANK Size: 4x4
V set#2 Schmidt WIYN 3.5-meter Telescope Hydra V set#2 Schmidt SIZE: 4x4
V set#2 Schmidt WIYN 3.5-meter Telescope Hydra V set#2 Schmidt SIZE: 4x4
V Harris set#1 4mts 5443/1060 1060.00 5443.00 SMARTS Consortium: 0.9-meter Telescope BLANK V Harris set#1 4mts 5443/1060 Size: 4x4 Thick: 5.12
V Harris set#1 4mts 1060.00 5443.00 WIYN 3.5-meter Telescope Hydra SIZE: 4x4-5.12mm.
V Harris set#1 4mts 1060.00 5443.00 WIYN 3.5-meter Telescope Hydra SIZE: 4x4-5.12mm.
V Harris k1003 948.66 5386.76 Nicholas U. Mayall 4-meter Telescope Mosaic V Harris k1003 V Harris k1003 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.
V Harris k1003 Nicholas U. Mayall 4-meter Telescope Mosaic V Harris k1003 V Harris k1003
V Harris k1003 Nicholas U. Mayall 4-meter Telescope Mosaic V Harris k1003
V Harris c6026 940.00 5370.00 Nicholas U. Mayall 4-meter Telescope Mosaic V Harris c6026 V Harris c6026 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.
V Harris 936.00 5399.00 WIYN 0.9-meter Telescope S2KB V Harris V Harris 04-2003
Us solid U k1044 588.20 3651.81 Nicholas U. Mayall 4-meter Telescope Mosaic Us solid U k1044 Us solid U k1044 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.
Us solid U k1044 Nicholas U. Mayall 4-meter Telescope Mosaic Us solid U k1044 Us solid U k1044
Un Steidel k1041 562.72 3479.17 Nicholas U. Mayall 4-meter Telescope Mosaic Un Steidel k1041 Un Steidel k1041 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.
Un Steidel k1041 Nicholas U. Mayall 4-meter Telescope Mosaic Un Steidel k1041 Un Steidel k1041
Ud Dey custom U k1045 329.76 3485.23 Nicholas U. Mayall 4-meter Telescope Mosaic Ud Dey custom U k1045 Ud Dey custom U k1045 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.
Ud Dey custom U k1045 Nicholas U. Mayall 4-meter Telescope Mosaic Ud Dey custom U k1045 Ud Dey custom U k1045
u_G0332 630.00 3500.00 Gemini South GMOS-S u_G0332 u_G0332
u_G0308 630.00 3500.00 Gemini North GMOS-N u_G0308 u_G0308
u Stromgren 3530/280 280.00 3530.00 SMARTS Consortium: 0.9-meter Telescope BLANK u Stromgren 3530/280 u Stromgren 3530/280 Size: 4x4 Thick: 9.15
u Stromgren 280.00 3530.00 WIYN 3.5-meter Telescope Hydra SIZE: 4x4-9.15mm.
u Stromgren 280.00 3530.00 WIYN 3.5-meter Telescope Hydra SIZE: 4x4-9.15mm.
u SDSS c6022 400.00 3600.00 Nicholas U. Mayall 4-meter Telescope Mosaic u SDSS c6022 u SDSS c6022 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.
U liq. CuSO4 Tek set#3 36237605 605.00 3623.00 SMARTS Consortium: 0.9-meter Telescope BLANK U liq. CuSO4 Tek set#3 36237605 U liq. CuSO4 Tek set#3 36237605 Size: 3x3 Thick: 8.83
U liq. CuSO4 Tek set#3 605.00 3623.00 WIYN 3.5-meter Telescope Hydra U liq. CuSO4 Tek set#3 U liq. CuSO4 Tek set#3 SIZE: 3x3-8.83mm.
U liq. CuSO4 Tek set#3 605.00 3623.00 WIYN 3.5-meter Telescope Hydra U liq. CuSO4 Tek set#3 U liq. CuSO4 Tek set#3 SIZE: 3x3-8.83mm.
U liq. CuSO4 Tek set #2 3570/660 660.00 3570.00 SMARTS Consortium: 0.9-meter Telescope BLANK Size: 3x3
U liq. CuSO4 Tek set #2 660.00 3570.00 WIYN 3.5-meter Telescope Hydra U liq. CuSO4 Tek set #2 U liq. CuSO4 Tek set #2 SIZE: 3x3
U liq. CuSO4 Tek set #2 660.00 3570.00 WIYN 3.5-meter Telescope Hydra U liq. CuSO4 Tek set #2 U liq. CuSO4 Tek set #2 SIZE: 3x3
U liq. CuSO4 Tek set #1 3575/600 600.00 3575.00 SMARTS Consortium: 0.9-meter Telescope BLANK U liq. CuSO4 Tek set #1 3575/600 U liq. CuSO4 Tek set #1 3575/600 Size: 3x3 Thick: 9.09
U liq. CuSO4 Tek set #1 600.00 3575.00 WIYN 3.5-meter Telescope Hydra SIZE: 3x3-09.09mm.
U liq. CuSO4 Tek set #1 600.00 3575.00 WIYN 3.5-meter Telescope Hydra SIZE: 3x3-09.09mm.
U liq. CuSO4 set#1 4mts 3580/610 610.00 3580.00 SMARTS Consortium: 0.9-meter Telescope BLANK U liq. CuSO4 set#1 4mts 3580/610 U liq. CuSO4 set#1 4mts 3580/610 Size: 4x4 Thick: 9.32
U liq. CuSO4 set#1 4mts 610.00 3580.00 WIYN 3.5-meter Telescope Hydra U liq. CuSO4 set#1 4mts U liq. CuSO4 set#1 4mts SIZE: 4x4-9.32mm.
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Updated on June 27, 2022, 11:32 am