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
kp6563a 74.00 6568.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
H-alpha6_2 74.00 6618.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha6_2 H-alpha6_2 =+6nm set2
HeII_G0340 74.00 4680.00 Gemini South GMOS-S HeII_G0340 HeII_G0340
KP1498 74.96 6823.53 Nicholas U. Mayall 4-meter Telescope KOSMOS KP1498 KP1498 KOSMOS Approved KPNO 4in. Filter.
kp6520b 75.00 6528.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combinrd
SAMI-[SII] Narrow 75.00 6724.00 SOAR Telescope SAM, SAMI SAMI-[SII] Narrow
narrow Halpha (CTIO set) 75.00 6563.00 SOAR Telescope Goodman, SOI narrow Halpha (CTIO set) narrow Halpha (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)
narrow Halpha 6600 (CTIO set) 75.00 6600.00 SOAR Telescope Goodman, SOI 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
HeIIC_G0341 75.00 4780.00 Gemini South GMOS-S HeIIC_G0341 HeIIC_G0341
H-alpha +27nm 75.00 6832.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha +27nm H-alpha +27nm set1
SAMI Hα Broad 75.00 6563.00 SOAR Telescope SAM, SAM-FP
SAMI-Ha Narrow 75.00 6563.00 SOAR Telescope SAM, SAMI SAMI-Ha Narrow
SAMI [SII] Broad 75.00 6724.00 SOAR Telescope SAM, SAM-FP
kp1412 76.00 4412.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1412 backup for kp802-janos
H-alpha +31nm 76.00 6877.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha +31nm H-alpha +31nm set1
KP1517 76.36 6866.80 Nicholas U. Mayall 4-meter Telescope KOSMOS KP1517 KP1517 KOSMOS Approved KPNO 4in. Filter.
kp6781b 77.00 6786.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
kp7433b 77.00 7434.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
kp6961a 77.00 6960.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
HeIIC_G0321 77.00 4780.00 Gemini North GMOS-N HeIIC_G0321 HeIIC_G0321
OIIIC_G0319 77.00 5140.00 Gemini North GMOS-N OIIIC_G0319 OIIIC_G0319
KP1497 77.75 6780.91 Nicholas U. Mayall 4-meter Telescope KOSMOS KP1497 KP1497 KOSMOS Approved KPNO 4in. Filter.
kp1345 78.00 6569.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1345
kp6916b 78.00 6918.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
kp7053a 78.00 7055.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
H-alpha +13nm 78.00 6691.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha +13nm H-alpha +13nm set1
Hale-Bopp UVC 78.00 3448.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters
H-alpha +22nm 78.00 6786.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha +22nm H-alpha +22nm set1
kp1346 78.00 6606.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1346
kp7336b 78.00 7333.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
KP1495 78.15 6685.37 Nicholas U. Mayall 4-meter Telescope KOSMOS KP1495 KP1495 KOSMOS Approved KPNO 4in. Filter.
kp1410 79.00 4519.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter DDO SET
kp7240b 79.00 7243.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
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.
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.
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.
kp7531a 80.00 7532.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
kp7099a 80.00 7103.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
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.
ha H-alpha k1009 80.62 6574.74 Nicholas U. Mayall 4-meter Telescope Mosaic ha H-alpha k1009 ha H-alpha k1009 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.
kp6693a 81.00 6694.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
kp6871b 81.00 6873.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
kp7680a 81.00 7683.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
kp1374 81.00 9183.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1374 vesa - omega
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.
918R 918R_v1 k1028 81.22 9210.96 Nicholas U. Mayall 4-meter Telescope Mosaic 918R 918R_v1 k1028 918R 918R_v1 k1028 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.
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.
kp7630b 82.00 7629.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp7630b halpha set combined
kp7883b 82.00 7880.00 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.

Updated on June 27, 2022, 11:32 am