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
wr475 WR 475 k1022 Nicholas U. Mayall 4-meter Telescope Mosaic wr475 WR 475 k1022 wr475 WR 475 k1022 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=4749A FWHM=51.32A PEAK TRANSMISSION=79.2%.
823 823_v1 k1027 Nicholas U. Mayall 4-meter Telescope Mosaic 823 823_v1 k1027
Rs Steidel k1043 Nicholas U. Mayall 4-meter Telescope Mosaic Rs Steidel k1043 Rs Steidel k1043
390 BATC k1052 ** Nicholas U. Mayall 4-meter Telescope Mosaic 390 BATC k1052 ** 390 BATC k1052 **
705 BATC k1060 ** Nicholas U. Mayall 4-meter Telescope Mosaic 705 BATC k1060 ** 705 BATC k1060 **
Barr J Band Filter Nicholas U. Mayall 4-meter Telescope Flamingos Barr J Band Filter Barr J Band Filter Cuton: 1.170 - Cutoff: 1.326
K4132 Gemini South Phoenix K4132 Start (cm-1 μm): 4077=2.452 - Stop (cm-1 μm): 4156=2.406 - Echelle order 23. Currently not installed in Phoenix.
1060 blocker, 1 μm blocker, 1056 + 1063 blocker 1063.50 Nicholas U. Mayall 4-meter Telescope NEWFIRM 1060 blocker, 1 μm blocker, 1056 + 1063 blocker Use with 1401, 1402
V set#2 Schmidt WIYN 3.5-meter Telescope Hydra V set#2 Schmidt SIZE: 4x4
Ks 21500.00 Víctor M. Blanco 4-meter Telescope ISPI ISPI Broad Band Filter. Wavelengths @80% (micron): 1.9915 - 2.2955
z Gunn 9100/1400 SMARTS Consortium: 0.9-meter Telescope BLANK Size: 4x4
kp1276a KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1276a
kp1309d KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1309d
ha12 H-alpha+12nm k1012 Nicholas U. Mayall 4-meter Telescope Mosaic ha12 H-alpha+12nm k1012 ha12 H-alpha+12nm k1012 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=6672A, FWHM=83A, PEAK TRANSMISSION=87.3%.
823 823_v1 k1027 Nicholas U. Mayall 4-meter Telescope Mosaic 823 823_v1 k1027 823 823_v1 k1027 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) and the CTIO 4m (f/2.9). At the KPNO 4m the properties of this filter are: CWL=8170A, FWHM=71A, PEAK TRANSMISSION=91.5%.
420 BATC k1053 ** Nicholas U. Mayall 4-meter Telescope Mosaic 420 BATC k1053 ** 420 BATC k1053 ** 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.
755 BATC k1061 ** Nicholas U. Mayall 4-meter Telescope Mosaic 755 BATC k1061 ** 755 BATC k1061 ** 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.
Barr H Band Filter Nicholas U. Mayall 4-meter Telescope Flamingos Barr H Band Filter Barr H Band Filter Cuton: 1.495 - Cutoff: 1.776
K4220 Gemini South Phoenix K4220 Start (cm-1 μm): 4188=2.392 - Stop (cm-1 μm): 4263=2.348 - Echelle order 24
R set #2 Schmidt WIYN 3.5-meter Telescope Hydra R set #2 Schmidt SIZE: 4x4
Y 10381.00 Víctor M. Blanco 4-meter Telescope ISPI ISPI Broad Band Filter. Wavelengths @80% (micron): BW 0.1457mu
z Gunn 9100/1400 SMARTS Consortium: 0.9-meter Telescope BLANK Size: 3x3
kp1267_14 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1267_14
kp1276a KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1276a
kp1346 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1346
kp1309d KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1309d
kp1001 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1001
I Nearly-Mould k1005 Nicholas U. Mayall 4-meter Telescope Mosaic I Nearly-Mould k1005 I Nearly-Mould k1005
wrhe2 WR HeII k1023 Nicholas U. Mayall 4-meter Telescope Mosaic wrhe2 WR HeII k1023 wrhe2 WR HeII k1023 Below is a plot of this filter as simulated in different f/ratio beams. At the KPNO 4m the properties of this filter are: CWL=4695A FWHM=51.34A PEAK TRANSMISSION=74.83%.
Us solid U k1044 Nicholas U. Mayall 4-meter Telescope Mosaic Us solid U k1044 Us solid U k1044
420 BATC k1053 ** Nicholas U. Mayall 4-meter Telescope Mosaic 420 BATC k1053 ** 420 BATC k1053 **
755 BATC k1061 ** Nicholas U. Mayall 4-meter Telescope Mosaic 755 BATC k1061 ** 755 BATC k1061 **
Barr Ks Band Filter Nicholas U. Mayall 4-meter Telescope Flamingos Barr Ks Band Filter Barr Ks Band Filter Cuton: 1.990 - Cutoff: 2.305
K4308 Gemini South Phoenix K4308 Start (cm-1 μm): 4258=2.349 - Stop (cm-1 μm): 4355=2.296 - Echelle order 24
Ca H&K line filter WIYN 3.5-meter Telescope Hydra Ca H&K line filter Ca H&K line filter SIZE: 4x4
SDSS z WIYN 3.5-meter Telescope Hydra SDSS z SIZE: 4x4
Cont-203 20336.00 Víctor M. Blanco 4-meter Telescope ISPI ISPI Narrow Band Filters. Wavelengths @80% (micron): 2,062 - 2,0400
OG-550 0.00 0.00 KPNO 2.1-meter Telescope GoldCam OG-550 OG-550 Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
GG-375 0.00 0.00 Nicholas U. Mayall 4-meter Telescope RC Spectrograph GG-375 GG-375 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
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.
OG-570 0.00 0.00 KPNO 2.1-meter Telescope GoldCam OG-570 OG-570 Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
GG-385 0.00 0.00 Nicholas U. Mayall 4-meter Telescope RC Spectrograph GG-385 GG-385 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
RG1000 0.00 10000.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters
RG610_G0331 0.00 0.00 Gemini South GMOS-S RG610_G0331 RG610_G0331
WG-320 0.00 0.00 KPNO 2.1-meter Telescope GoldCam WG-320 WG-320 Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
RG-610 0.00 0.00 KPNO 2.1-meter Telescope GoldCam RG-610 RG-610 Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
GG-400b 0.00 0.00 Nicholas U. Mayall 4-meter Telescope RC Spectrograph GG-400b GG-400b Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
kp1339a 0.00 0.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1339a gunn set 'z' from stsci RG850 3mm

Updated on June 27, 2022, 11:32 am