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.)

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NOIRLab Filter Database

Filter FWHM (Å) CWL (Å) Telescope Instrument Plot Data Comments
Stromgren u 278.00 3537.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Stromgren u Stromgren u UG11+WG345
kp350b 423.00 3544.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350b stromgren u 4c set b
kp350b 423.00 3544.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350b stromgren u 4c set b
kp350b 423.00 3544.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350b stromgren u 4c set b
kp350b 423.00 3544.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350b stromgren u 4c set b
U k1001 630.71 3552.00 Nicholas U. Mayall 4-meter Telescope Mosaic U k1001 U k1001 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.
kp350c 428.00 3560.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350c stromgren u 4c set c
kp350c 428.00 3560.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350c stromgren u 4c set c
kp350c 428.00 3560.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350c stromgren u 4c set c
kp350c 428.00 3560.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350c stromgren u 4c set c
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 c6001 650.00 3570.00 Nicholas U. Mayall 4-meter Telescope Mosaic U c6001 U c6001 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 #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 #1 600.00 3575.00 WIYN 3.5-meter Telescope Hydra SIZE: 3x3-09.09mm.
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 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.
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.
kplu9 655.00 3590.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kplu9 Liq.CUSO4+UG2 :: spare
LU6 647.00 3593.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters LCuSO4+1mmUG2+1mmQuartz
LU8 646.00 3594.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters LCuSO4+1mmUG2+1mmQuartz - Not available
kplu2 651.00 3594.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter CUSO4+UG2 "U"
LU10 652.00 3595.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters LU10 LU10 LCuSO4+1mmUG1 +1mmQuartz -- 2.1 meter set
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.
kp1305a 499.00 3600.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter nearly mould U-omega
kplu3 634.00 3605.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kplu3 Arlo's CCD set "U" notify Arlo if changed- CUSO4+UG2
kp1310b 489.00 3610.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter nearly mould u-omega
LU7 631.00 3612.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters LU7 LU7 LCuSO4+1mmUG2+1mmQuartz
kplu5 623.00 3613.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kplu5 CUSO4+UG2 "U" filled 5/89
kp1310a 476.00 3615.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter nearly mould u-omega
kplu4 620.00 3618.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter CUSO4+UG2 "U" filled 5/89
kplu1 603.00 3623.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter CUSO4+UG2 "U" filled 5/89
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 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.
Bessell U 784.00 3624.00 SOAR Telescope Goodman, SOI Bessell U Bessell U 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
kp947 30.00 3630.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter o II
U Harris Solid 556.00 3645.00 WIYN 0.9-meter Telescope S2KB U Harris Solid U Harris Solid 03-2004
U Harris Solid 556.00 3645.00 WIYN 0.9-meter Telescope S2KB U Harris Solid Bandpass.
kp1207 637.00 3648.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter
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.
Johnson U 3660.00 SOAR Telescope Goodman Goodman Spectrograph circular 4 inch diameter filters - Central wavelength = 366
o2 OII c6012 50.00 3727.00 Nicholas U. Mayall 4-meter Telescope Mosaic o2 OII c6012 o2 OII c6012 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.
kp1548 39.00 3736.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters kp1548 kp1548 Replaces 1277 1278; damaged coating?
kp522 62.00 3753.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter
Hydra EC#19 181.00 3780.00 BLANK Hydra, Hydra Echelle Mode Hydra EC#19 Order: 14.75
kp306 323.00 3841.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter DDO38 5mm7-51,2mmbg39,2mmgg375
GG-385 3850.00 SOAR Telescope Goodman Goodman Spectrograph circular 4 inch diameter filters - Cutoff wavelength: < 385

Updated on June 27, 2022, 11:32 am