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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
kp1458e 170.00 4723.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1458e strombren b
4-96 1756.27 4724.00 KPNO 2.1-meter Telescope GoldCam 4-96 4-96 Bandpass Filter.
kp1457d 170.00 4727.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1457d stromgren b
Stromgren b 193.00 4730.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters Stromgren b Stromgren b
BG-39 2424.35 4736.60 Nicholas U. Mayall 4-meter Telescope RC Spectrograph BG-39 BG-39 Bandpass Filter.
SDSS g' 1734.00 4737.00 SOAR Telescope Goodman, SOI SDSS g' SDSS g' 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
gd DECam k1035 *** New! 1524.00 4744.90 Nicholas U. Mayall 4-meter Telescope Mosaic gd DECam k1035 *** New! gd DECam k1035 *** New! 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.
Hydra EC#13 309.00 4745.00 BLANK Hydra, Hydra Echelle Mode Hydra EC#13 Order: 11.75
g_G0301 1547.00 4750.00 Gemini North GMOS-N g_G0301 g_G0301
S8612 5100.00 4750.00 SOAR Telescope Goodman S8612 S8612 Goodman Spectrograph circular 4 inch diameter filters - Wavelength range: ~330-620
g_G0325 1547.00 4750.00 Gemini South GMOS-S g_G0325 g_G0325
SAMI-g SDSS 735.00 4750.00 SOAR Telescope SAM, SAMI SAMI-g SDSS
g SDSS k1017 1395.73 4750.58 Nicholas U. Mayall 4-meter Telescope Mosaic g SDSS k1017 g SDSS k1017 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.
kp803 53.00 4754.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters kp803 kp803 Edge deterioration, replaced by KP1573 - Not available
SDSS g' 1430.00 4759.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters SDSS g' SDSS g' Sloan Digital Sky Survey set
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.
kp1573 55.00 4767.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters kp1573 kp1573 Replaces KP803
DECam g 1003.70 4770.80 Víctor M. Blanco 4-meter Telescope Dark Energy Camera DECam g DECam g
BG-39 2359.51 4773.35 KPNO 2.1-meter Telescope GoldCam BG-39 BG-39 Beware of red leak. Bandpass Filter.
HeIIC_G0321 77.00 4780.00 Gemini North GMOS-N HeIIC_G0321 HeIIC_G0321
HeIIC_G0341 75.00 4780.00 Gemini South GMOS-S HeIIC_G0341 HeIIC_G0341
SDSS_g 1536.00 4792.00 Gemini South ZORRO SDSS_g SDSS_g not convolved with dichroic
SDSS_g 1536.00 4792.00 Gemini North ALOPEKE SDSS_g SDSS_g not convolved with dichroic
kp1211 1580.00 4803.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1211
kp1211 1580.00 4803.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1211
g SDSS c6017 1537.00 4813.00 Nicholas U. Mayall 4-meter Telescope Mosaic g SDSS c6017 g SDSS c6017 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.
Gn Steidel k1042 762.13 4819.66 Nicholas U. Mayall 4-meter Telescope Mosaic Gn Steidel k1042 Gn Steidel k1042 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.
Hb-narrow 30.00 4854.00 WIYN 0.9-meter Telescope S2KB Hb-narrow Hb-narrow 01-2013
kp1275 164.00 4856.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1275 h beta system
kp804 57.00 4859.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters kp804 kp804 Coating deteriorated, replaced by KP1574 - Not available
kp1274 164.00 4860.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1274 h beta system
kp1272 28.00 4860.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1272 nebular set
kp1579 24.00 4861.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1579 H Beta N
kp1273 28.00 4865.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1273 h beta system
kp1578 155.00 4868.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1578 H Beta wide
H-beta wide 173.00 4871.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-beta wide H-beta wide
HBeta 63.00 4871.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters HBeta HBeta Replaces 804
Hb-wide 139.00 4875.00 WIYN 0.9-meter Telescope S2KB Hb-wide Hb-wide 01-2013
H-beta narrow 25.00 4876.00 KPNO 2.1-meter Telescope KPNO 4-Inch Filters H-beta narrow H-beta narrow
BG-38 2793.59 4879.23 Nicholas U. Mayall 4-meter Telescope RC Spectrograph BG-38 BG-38 Bandpass Filter.
kp523 52.00 4884.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp523 video camera
kp523 52.00 4884.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp523 video camera
kp1225 31.00 4885.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1225 video camera
kp250 18.00 4888.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp250 from sao
kp1411 184.00 4890.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1411 DDO SET
kp1411 184.00 4890.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1411 DDO SET
BG-38-1 2657.20 4896.52 KPNO 2.1-meter Telescope GoldCam BG-38-1 BG-38-1 Beware of red leak. Bandpass Filter.
BG-38-1 2657.20 4896.52 KPNO 2.1-meter Telescope GoldCam BG-38-1 BG-38-1 Beware of red leak. Bandpass Filter.
BG-38-2 2657.20 4896.52 KPNO 2.1-meter Telescope GoldCam BG-38-2 BG-38-2 Beware of red leak. Bandpass Filter.
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
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Updated on June 27, 2022, 11:32 am