1. Filter Information
  2. Filter Information

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
V Tek set#2 5438/1026 1026.00 5438.00 SMARTS Consortium: 0.9-meter Telescope BLANK V Tek set#2 5438/1026 Size: 3x3
VR Bernstein k1040 *** Retired! 2119.56 5944.95 Nicholas U. Mayall 4-meter Telescope Mosaic VR Bernstein k1040 *** Retired! VR Bernstein k1040 *** Retired! NOTE: This filter was damaged in June 2011 and is retired. 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.
VR Bernstein k1040 *** Retired! Nicholas U. Mayall 4-meter Telescope Mosaic VR Bernstein k1040 *** Retired! VR Bernstein k1040 *** Retired! 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=5934A, FWHM=2079A, PEAK TRANSMISSION=95.3%.
VR k1039 *** New! 2216.00 5940.00 Nicholas U. Mayall 4-meter Telescope Mosaic VR k1039 *** New! VR k1039 *** New! NOTE: This filter is a replacement for k1040. 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.
Wash set - t1 651.00 6251.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Wash set - t1 Wash set - t1
Washington - c 1046.00 3979.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Washington - c Washington - c Corning glass
Washington - m 1012.00 5097.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Washington - m Washington - m Corning glass
Washington 51 174.00 5142.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Washington 51 Washington 51 Replaces KP1525
Washington C 1044.00 3866.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Washington C Washington C Revised 8/95 (Schott glass)
Washington C KPNO 2.1-meter Telescope KPNO 4-Inch Filters Washington C Washington C
Washington c48 200.00 4898.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Washington c48 Washington c48 Washington set, property of Doug Welch, McMaster Univ
Washington M 1112.00 5141.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Washington M Washington M Revised 8/95 (Schott glass)
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.
WG-345 0.00 0.00 KPNO 2.1-meter Telescope GoldCam WG-345 WG-345 Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
WG-345 0.00 0.00 Nicholas U. Mayall 4-meter Telescope RC Spectrograph WG-345 WG-345 Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
WG-360 0.00 0.00 KPNO 2.1-meter Telescope GoldCam Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
WG-360 0.00 0.00 Nicholas U. Mayall 4-meter Telescope RC Spectrograph WG-360 WG-360 Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
wh Bk-7 c6016 5000.00 6500.00 Nicholas U. Mayall 4-meter Telescope Mosaic
wh Bk-7 k1016 6800.00 5600.00 Nicholas U. Mayall 4-meter Telescope Mosaic wh Bk-7 k1016 wh Bk-7 k1016 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.
Wide VR filter VR 2410.00 6000.00 SOAR Telescope Goodman, SOI Wide VR filter VR 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
Wing CN 116.00 8123.00 SOAR Telescope Goodman, SOI Wing CN Wing CN 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
Wing TiO 125.00 7779.00 SOAR Telescope Goodman, SOI Wing TiO Wing TiO 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
wr475 WR 475 k1022 51.27 4764.00 Nicholas U. Mayall 4-meter Telescope Mosaic wr475 WR 475 k1022 wr475 WR 475 k1022 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.
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%.
wrc3 WR CIII k1021 51.71 4666.15 Nicholas U. Mayall 4-meter Telescope Mosaic wrc3 WR CIII k1021 wrc3 WR CIII k1021 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.
wrc3 WR CIII k1021 Nicholas U. Mayall 4-meter Telescope Mosaic wrc3 WR CIII k1021 wrc3 WR CIII k1021 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=4657A FWHM=52.6A PEAK TRANSMISSION=68.23%
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.
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%
wrhe2 WR HeII k1023 50.31 4702.60 Nicholas U. Mayall 4-meter Telescope Mosaic wrhe2 WR HeII k1023 wrhe2 WR HeII k1023 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.
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%.
Y 1072.00 10204.00 Gemini North GNIRS Y Y
Y 1000.00 1.00 SOAR Telescope SPARTAN IR
Y 978.00 10200.00 Gemini North NIRI Y Y
Y 1005.00 10200.00 Gemini South FLAMINGOS2 Y Y
Y 10381.00 Víctor M. Blanco 4-meter Telescope ISPI ISPI Broad Band Filter. Wavelengths @80% (micron): BW 0.1457mu
y Str"m. 4x4 244.00 5478.00 WIYN 3.5-meter Telescope Hydra y Str"m. 4x4 SIZE: 4x4-9.74mm.
y Str"m. 4x4 244.00 5478.00 WIYN 3.5-meter Telescope Hydra y Str"m. 4x4 SIZE: 4x4-9.74mm.
y Str"m. 4x4 5497/241 244.00 5478.00 SMARTS Consortium: 0.9-meter Telescope BLANK y Str"m. 4x4 5497/241 Size: 4x4 Thick: 9.74
Y_G0323 1023.00 10100.00 Gemini South GMOS-S Y_G0323 Y_G0323
Y_G0323 1023.00 10100.00 Gemini North GMOS-N Y_G0323 Y_G0323
Y_G0344 1023.00 10100.00 Gemini South GMOS-S Y_G0344 Y_G0344
YALO B SMARTS 1.3-meter Telescope ANDICAM YALO B YALO B Legacy Filter
YALO wide R SMARTS 1.3-meter Telescope ANDICAM YALO wide R YALO wide R Legacy Filter
z Gunn WIYN 3.5-meter Telescope Hydra SIZE: 4x4
z Gunn WIYN 3.5-meter Telescope Hydra SIZE: 3x3
z Gunn WIYN 3.5-meter Telescope Hydra SIZE: 4x4
z Gunn WIYN 3.5-meter Telescope Hydra SIZE: 3x3
z Gunn 9100/1400 SMARTS Consortium: 0.9-meter Telescope BLANK Size: 4x4
z Gunn 9100/1400 SMARTS Consortium: 0.9-meter Telescope BLANK Size: 3x3
z SDSS c6020 2000.00 9400.00 Nicholas U. Mayall 4-meter Telescope Mosaic z SDSS c6020 z SDSS c6020 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.
Showing 1201 - 1250 of 1258

Updated on June 27, 2022, 11:32 am