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
SAMI-Ha Narrow 75.00 6563.00 SOAR Telescope SAM, SAMI SAMI-Ha Narrow
KP811 88.46 6563.62 Nicholas U. Mayall 4-meter Telescope KOSMOS KP811 KP811 KOSMOS Approved KPNO 4in. Filter.
H-alpha 32.00 6565.00 Gemini South ZORRO H-alpha H-alpha not convolved with dichroic
kp1281 160.00 6565.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1281 h alpha
H-alpha 32.00 6565.00 Gemini North ALOPEKE H-alpha H-alpha not convolved with dichroic
kp1276 35.00 6565.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1276 nebular set
kp1276a 36.00 6566.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1276a
kp376 9.00 6567.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp376 backup for 795 janos
Halpha 656375-4 68.00 6567.00 SMARTS Consortium: 0.9-meter Telescope BLANK Halpha 656375-4 Size: 4x4 Thick: 5.54
H-alpha 84.00 6567.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha H-alpha Andover [set1?]
Halpha 68.00 6567.00 WIYN 3.5-meter Telescope Hydra Halpha SIZE: 4x4-5.54mm.
Halpha 68.00 6567.00 WIYN 3.5-meter Telescope Hydra Halpha SIZE: 4x4-5.54mm.
kp1281a 170.00 6568.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1281a
kp6563a 74.00 6568.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter halpha set combined
kp1345 78.00 6569.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1345
kp810 39.00 6569.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp810 h alpha system
kp1434 29.00 6569.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1434 halpha replaces kp810
BTFI_6569/20 BTFI 18.60 6569.20 SOAR Telescope SAM, SAMI
BTFI 6569 / 20 18.60 6569.20 SOAR Telescope SAM, SAM-FP
H-alpha 89.00 6572.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha H-alpha Some edge deterioration
H-alpha_2 67.00 6573.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha_2 H-alpha_2 set2
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.
H-alpha 59.00 6577.00 WIYN 0.9-meter Telescope S2KB H-alpha H-alpha 10-2007
kp1282 168.00 6577.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1282 h alpha replaced
H-alpha 59.00 6577.00 WIYN 0.9-meter Telescope S2KB H-alpha Bandpass.
KP1390 72.39 6577.44 Nicholas U. Mayall 4-meter Telescope KOSMOS KP1390 KP1390 KOSMOS Approved KPNO 4in. Filter.
BTFI_6579/20 BTFI 19.90 6578.80 SOAR Telescope SAM, SAMI
BTFI 6579 / 20 19.90 6578.80 SOAR Telescope SAM, SAM-FP
SAMI-[NII]6583 Narrow 18.00 6583.00 SOAR Telescope SAM, SAMI SAMI-[NII]6583 Narrow
SAMI [NII] Narrow 18.00 6583.00 SOAR Telescope SAM, SAM-FP
kp256 13.00 6586.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp256 nebular set
H-alpha 72.00 6587.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha H-alpha Andover
kp1520 16.00 6590.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1520 nebular set replaces kp256
660075-3 69.00 6598.00 SMARTS Consortium: 0.9-meter Telescope BLANK 660075-3 Size: 3x3 Thick: 5.57
N/A 69.00 6598.00 WIYN 3.5-meter Telescope Hydra N/A SIZE: 3x3-5.57mm.
N/A 69.00 6598.00 WIYN 3.5-meter Telescope Hydra N/A SIZE: 3x3-5.57mm.
660075-4 67.00 6600.00 SMARTS Consortium: 0.9-meter Telescope BLANK 660075-4 Size: 4x4 Thick: 5.57
N/A 67.00 6600.00 WIYN 3.5-meter Telescope Hydra N/A SIZE: 4x4-5.57mm.
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)
N/A 67.00 6600.00 WIYN 3.5-meter Telescope Hydra N/A SIZE: 4x4-5.57mm.
BTFI_6600/20 BTFI 19.30 6600.50 SOAR Telescope SAM, SAMI
BTFI 6600 / 20 19.30 6600.50 SOAR Telescope SAM, SAM-FP
kp1346 78.00 6606.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1346
KP1391 68.39 6608.47 Nicholas U. Mayall 4-meter Telescope KOSMOS KP1391 KP1391 KOSMOS Approved KPNO 4in. Filter.
kp6606a 71.00 6611.00 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
H-alpha+4nm 60.00 6618.00 WIYN 0.9-meter Telescope S2KB H-alpha+4nm H-alpha+4nm 10-2007
H-alpha+4nm 60.00 6618.00 WIYN 0.9-meter Telescope S2KB H-alpha+4nm Bandpass.
HaC_G0311 69.00 6620.00 Gemini North GMOS-N HaC_G0311 HaC_G0311
H-alpha +6nm 67.00 6620.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-alpha +6nm H-alpha +6nm Andover

Updated on June 27, 2022, 11:32 am