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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.
{ Please fill out and send the signed form via either email (richard.joyce@noirlab.edu), or mail (950 North Cherry Avenue # Tucson, AZ 85719) }

NOIRLab Filter Database

Filter FWHM (Å) CWL (Å) Telescope Instrument Plot Data Comments
2124/68 blocker 2 μm blocker 257.00 2165.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM 2124/68 blocker 2 μm blocker Use with 4301, 4302
1187 nm 1187, 1.19 μm continuum 11.10 1186.40 Nicholas U. Mayall 4-meter Telescope NEWFIRM 1187 nm 1187, 1.19 μm continuum Use with 2104.
2096 nm 20.40 2096.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM 2096 nm
H 127 286.00 1627.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM H 127 Use with 3103, 3203
H 133 286.00 1634.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM Use with 3103, 3203. These filters have never been used in NEWFIRM.
1056 nm, 1056 0.74 1056.37 Nicholas U. Mayall 4-meter Telescope NEWFIRM 1056 nm, 1056 Use with 1403
H + K blocker 1320.00 2030.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM H + K blocker Use with 3101, 3102
1063 nm, 1063 0.81 1063.09 Nicholas U. Mayall 4-meter Telescope NEWFIRM 1063 nm, 1063 Use with 1403
HX 308.00 1631.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM HX
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
H1, Yale H1 174.70 1555.70 Nicholas U. Mayall 4-meter Telescope NEWFIRM Use with 3203
J 241 158.00 1246.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM Use with 2103. These filters have never been used in NEWFIRM
H2, Yale H2 168.30 1705.90 Nicholas U. Mayall 4-meter Telescope NEWFIRM Use with 3204
J 253 158.00 1252.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM Use with 2103.
H1 + 2 blocker, Yale H1 +2 blcoker 472.00 1622.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM Use with 3101, 3102, 3201, 3202
He I 94.00 1082.00 WIYN 3.5-meter Telescope WHIRC He I
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.
Pa β 158.00 1280.00 WIYN 3.5-meter Telescope WHIRC Pa β
Pa β 45 133.00 1303.00 WIYN 3.5-meter Telescope WHIRC Pa β 45 The Pa β 45 and CO-n filters were removed from WHIRC in January 2012 and replaced by the CN and CO-w filters.
[Fe II] 164.00 1646.00 WIYN 3.5-meter Telescope WHIRC [Fe II]
[Fe II] 45 162.00 1668.00 WIYN 3.5-meter Telescope WHIRC [Fe II] 45
H2 S(1) 216.00 2117.00 WIYN 3.5-meter Telescope WHIRC H2 S(1)
Br γ 215.00 2162.00 WIYN 3.5-meter Telescope WHIRC Br γ
Br γ 45 237.00 2188.00 WIYN 3.5-meter Telescope WHIRC Br γ 45
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.
J 162.00 1250.00 WIYN 3.5-meter Telescope WHIRC J
H 310.00 1651.00 WIYN 3.5-meter Telescope WHIRC H
Ks 343.00 2168.00 WIYN 3.5-meter Telescope WHIRC Ks
Low airglow 132.00 1060.00 WIYN 3.5-meter Telescope WHIRC Low airglow
OCLI K Band Filter Nicholas U. Mayall 4-meter Telescope Flamingos OCLI K Band Filter OCLI K Band Filter Cuton: 2.028 - Cutoff: 2.365
Janos JH Band Filter Nicholas U. Mayall 4-meter Telescope Flamingos Janos JH Band Filter Janos JH Band Filter Cuton: 0.947 - Cutoff: 1.870
Janos HK Band Filter Nicholas U. Mayall 4-meter Telescope Flamingos Janos HK Band Filter Janos HK Band Filter Cuton: 1.37 - Cutoff: 2.6
James Rhoads Low-background J Filter Nicholas U. Mayall 4-meter Telescope Flamingos James Rhoads Low-background J Filter Cuton: 1.050 - Cutoff: 1.385
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
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
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
I Nearly-Mould k1005 Nicholas U. Mayall 4-meter Telescope Mosaic I Nearly-Mould k1005
ha16 H-alpha+16nm k1013 Nicholas U. Mayall 4-meter Telescope Mosaic ha16 H-alpha+16nm k1013 ha16 H-alpha+16nm k1013 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=6705A, FWHM=81A, PEAK TRANSMISSION=91.7%.
wrc4 WR CIV k1024 41.79 5828.71 Nicholas U. Mayall 4-meter Telescope Mosaic wrc4 WR CIV k1024 wrc4 WR CIV k1024 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.
918R 918R_v1 k1028 Nicholas U. Mayall 4-meter Telescope Mosaic 918R 918R_v1 k1028 918R 918R_v1 k1028
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.
454 BATC k1054 ** Nicholas U. Mayall 4-meter Telescope Mosaic 454 BATC k1054 ** 454 BATC k1054 ** 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.
802 BATC k1062 ** Nicholas U. Mayall 4-meter Telescope Mosaic 802 BATC k1062 ** 802 BATC k1062 ** 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.
ha H-alpha c6009 80.00 6563.00 Nicholas U. Mayall 4-meter Telescope Mosaic ha H-alpha c6009 ha H-alpha c6009 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.
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.
O3 OIII N2 k1014 * 55.55 5024.90 Nicholas U. Mayall 4-meter Telescope Mosaic O3 OIII N2 k1014 * O3 OIII N2 k1014 * 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.
wrc4 WR CIV k1024 Nicholas U. Mayall 4-meter Telescope Mosaic wrc4 WR CIV k1024 wrc4 WR CIV k1024 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=5819A FWHM=42.17A PEAK TRANSMISSION=71.36%
918R 918R_v1 k1028 Nicholas U. Mayall 4-meter Telescope Mosaic 918R 918R_v1 k1028
Ud Dey custom U k1045 Nicholas U. Mayall 4-meter Telescope Mosaic Ud Dey custom U k1045 Ud Dey custom U k1045
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Updated on June 27, 2022, 11:32 am