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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.)

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NOIRLab Filter Database

Filter FWHM (Å) CWL (Å) Telescope Instrument Plot Data Comments
HaC_G0337 70.00 6620.00 Gemini South GMOS-S HaC_G0337 HaC_G0337
ha4 H-alpha+4nm k1010 80.48 6620.52 Nicholas U. Mayall 4-meter Telescope Mosaic ha4 H-alpha+4nm k1010 ha4 H-alpha+4nm k1010 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.
DECam N662 170.00 6622.40 Víctor M. Blanco 4-meter Telescope Dark Energy Camera DECam N662
KP1494 86.37 6647.82 Nicholas U. Mayall 4-meter Telescope KOSMOS KP1494 KP1494 KOSMOS Approved KPNO 4in. Filter.
kp6649a 70.00 6650.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
ha8 H-alpha+8nm c6011 80.00 6650.00 Nicholas U. Mayall 4-meter Telescope Mosaic ha8 H-alpha+8nm c6011 ha8 H-alpha+8nm c6011 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.
H-alpha9_2 68.00 6653.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha9_2 H-alpha9_2 =+9nm set2
ha8 H-alpha+8nm k1011 81.33 6654.19 Nicholas U. Mayall 4-meter Telescope Mosaic ha8 H-alpha+8nm k1011 ha8 H-alpha+8nm k1011 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.
H-alpha +9nm 84.00 6658.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha +9nm H-alpha +9nm set1
H-alpha+8nm 60.00 6658.00 WIYN 0.9-meter Telescope S2KB H-alpha+8nm H-alpha+8nm 10-2007
H-alpha+8nm 60.00 6658.00 WIYN 0.9-meter Telescope S2KB H-alpha+8nm Bandpass.
KP1495 78.15 6685.37 Nicholas U. Mayall 4-meter Telescope KOSMOS KP1495 KP1495 KOSMOS Approved KPNO 4in. Filter.
H-alpha +13nm 78.00 6691.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha +13nm H-alpha +13nm set1
kp6693a 81.00 6694.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
ha12 H-alpha+12nm k1012 82.95 6698.53 Nicholas U. Mayall 4-meter Telescope Mosaic ha12 H-alpha+12nm k1012 ha12 H-alpha+12nm k1012 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.
H-alpha+12nm 63.00 6700.00 WIYN 0.9-meter Telescope S2KB H-alpha+12nm Bandpass.
H-alpha+12nm 63.00 6700.00 WIYN 0.9-meter Telescope S2KB H-alpha+12nm H-alpha+12nm 10-2007
H-alpha14_2 71.00 6709.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha14_2 H-alpha14_2 =+14nm set2
kp624 1539.00 6711.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter
kp858 10.00 6715.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp858
kp798 7.00 6718.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp798 SII bad red leak at 1000nm
kp247 12.00 6719.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp247 nebular set
SII_G0335 44.00 6720.00 Gemini South GMOS-S SII_G0335 SII_G0335
SII_G0317 52.00 6720.00 Gemini North GMOS-N SII_G0317 SII_G0317
kp859 26.00 6723.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp859
SAMI-[SII] Narrow 75.00 6724.00 SOAR Telescope SAM, SAMI SAMI-[SII] Narrow
SAMI [SII] Broad 75.00 6724.00 SOAR Telescope SAM, SAM-FP
s2 SII c6013 80.00 6725.00 Nicholas U. Mayall 4-meter Telescope Mosaic s2 SII c6013 s2 SII c6013 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.
r Gunn-T 6728/1000 1000.00 6728.00 SMARTS Consortium: 0.9-meter Telescope BLANK r Gunn-T 6728/1000 Size: 3x3 Thick: 5.05
r Gunn-T 1000.00 6728.00 WIYN 3.5-meter Telescope Hydra r Gunn-T SIZE: 3x3-05.05mm.
r Gunn-T 1000.00 6728.00 WIYN 3.5-meter Telescope Hydra r Gunn-T SIZE: 3x3-05.05mm.
ha16 H-alpha+16nm k1013 81.10 6730.72 Nicholas U. Mayall 4-meter Telescope Mosaic ha16 H-alpha+16nm k1013 ha16 H-alpha+16nm k1013 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.
kp805 11.00 6731.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp805
kp248 13.00 6734.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp248 nebular set
SAMI [SII] Narrow 27.00 6738.00 SOAR Telescope SAM, SAM-FP
SAMI-[SII]6738 Narrow 27.00 6738.00 SOAR Telescope SAM, SAMI SAMI-[SII]6738 Narrow
narrow [S II] (CTIO set) 50.00 6738.00 SOAR Telescope Goodman, SOI narrow [S II] (CTIO set) narrow [S II] (CTIO set) 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
H-alpha+16nm 60.00 6742.00 WIYN 0.9-meter Telescope S2KB H-alpha+16nm H-alpha+16nm 4-2008
KP1496 84.11 6742.88 Nicholas U. Mayall 4-meter Telescope KOSMOS KP1496 KP1496 KOSMOS Approved KPNO 4in. Filter.
SII 50.00 6744.00 WIYN 3.5-meter Telescope Hydra SII SIZE: 4x4-7.97mm.
SII 6738/50 50.00 6744.00 SMARTS Consortium: 0.9-meter Telescope BLANK SII 6738/50 Size: 4x4 Thick: 7.97
SII 50.00 6744.00 WIYN 3.5-meter Telescope Hydra SII SIZE: 4x4-7.97mm.
kp6737a 84.00 6744.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp6737a halpha set combined
BTFI_6745/38 BTFI 38.50 6745.00 SOAR Telescope SAM, SAMI
BTFI 6745 / 38 38.50 6745.00 SOAR Telescope SAM, SAM-FP
H-alpha +18nm 83.00 6746.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha +18nm H-alpha +18nm set1
Hydra EC#6 684.00 6757.00 BLANK Hydra, Hydra Echelle Mode Hydra EC#6 Order: 8.25
kp373 1051.00 6757.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter gunn set kp coated rg-630
kp373a 1056.00 6766.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter coated RG630 gunn set r
KP1497 77.75 6780.91 Nicholas U. Mayall 4-meter Telescope KOSMOS KP1497 KP1497 KOSMOS Approved KPNO 4in. Filter.
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Updated on June 27, 2022, 11:32 am