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.
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NOIRLab Filter Database

Filter FWHM (Å) CWL (Å) Telescope Instrument Plot Data Comments
EO_832 403.00 8320.00 Gemini North ALOPEKE EO_832 EO_832 not convolved with dichroic
u SDSS c6022 400.00 3600.00 Nicholas U. Mayall 4-meter Telescope Mosaic u SDSS c6022 u SDSS c6022 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.
kp350a 387.00 3459.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350a stromgren u 4c set a
kp350a 387.00 3459.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350a stromgren u 4c set a
kp350a 387.00 3459.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350a stromgren u 4c set a
kp350a 387.00 3459.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350a stromgren u 4c set a
Hydra EC#11 379.00 5186.00 BLANK Hydra, Hydra Echelle Mode Hydra EC#11 Order: 10.75
kp304 379.00 7011.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp304 i r filter
kp1492 373.00 8255.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1492 pierce, mike ordered
kp1493 372.00 8238.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1493 pierce, mike ordered
H221 358.00 22465.00 Gemini North NIRI H221 H221
Ks 343.00 2168.00 WIYN 3.5-meter Telescope WHIRC Ks
Hydra EC#12 341.00 4955.00 BLANK Hydra, Hydra Echelle Mode Hydra EC#12 Order: 11.25
BRGAMMA 338.00 21686.00 Gemini North NIRI BRGAMMA BRGAMMA
CO20 330.00 22890.00 Gemini North NIRI CO20 CO20
Ud Dey custom U k1045 329.76 3485.23 Nicholas U. Mayall 4-meter Telescope Mosaic Ud Dey custom U k1045 Ud Dey custom U k1045 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.
kp1079 326.00 7843.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1079
Kcntlong_G1112 324.00 22700.00 Gemini South GSAOI
kp306 323.00 3841.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter DDO38 5mm7-51,2mmbg39,2mmgg375
J1 blocker, Yale J1 blocker 321.00 1097.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM Use with 2201
cont_3 320.00 22080.00 SOAR Telescope SPARTAN IR Width [km/s]: 4310. Note that SPARTAN filters are permanently mounted in the instrument, and therefore are always available and need not be specified in Instrument Setup forms.
KXS 320.00 2150.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM KXS
cont_1 320.00 20400.00 SOAR Telescope SPARTAN IR Width [km/s]: 4660. Note that SPARTAN filters are permanently mounted in the instrument, and therefore are always available and need not be specified in Instrument Setup forms.
H210 318.00 21239.00 Gemini North NIRI H210 H210
KS 313 315.00 2128.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM Use with 3103. These filters have never been used in NEWFIRM.
kp350d 315.00 3508.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp350d stromgren u set d
H2(2-1)_G1123 314.00 22480.00 Gemini South GSAOI H2(2-1)_G1123 H2(2-1)_G1123
KCONT1 314.00 20975.00 Gemini North NIRI KCONT1 KCONT1
KCONT2 314.00 22718.00 Gemini North NIRI KCONT2 KCONT2
H2 314.00 21220.00 Gemini North GNIRS H2 H2
KS 318 312.00 2129.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM Use with 3103
H 310.00 1651.00 WIYN 3.5-meter Telescope WHIRC H
H2 310.00 21160.00 SOAR Telescope SPARTAN IR Width [km/s]: 4380. Note that SPARTAN filters are permanently mounted in the instrument, and therefore are always available and need not be specified in Instrument Setup forms.
Hydra EC#13 309.00 4745.00 BLANK Hydra, Hydra Echelle Mode Hydra EC#13 Order: 11.75
BrG_G1122 308.00 21660.00 Gemini South GSAOI BrG_G1122 BrG_G1122
HX 308.00 1631.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM HX
cont_2 300.00 21400.00 SOAR Telescope SPARTAN IR Width [km/s]: 4260. Note that SPARTAN filters are permanently mounted in the instrument, and therefore are always available and need not be specified in Instrument Setup forms.
HE12P2S 294.00 20595.00 Gemini North NIRI HE12P2S HE12P2S
H2(1-0)_G1121 293.00 21220.00 Gemini South GSAOI H2(1-0)_G1121 H2(1-0)_G1121
He I / C IV 290.00 20650.00 SOAR Telescope SPARTAN IR Width [km/s]: 4150. Note that SPARTAN filters are permanently mounted in the instrument, and therefore are always available and need not be specified in Instrument Setup forms.
Kcntshrt_G1111 287.00 20930.00 Gemini South GSAOI
H 127 286.00 1627.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM H 127 Use with 3103, 3203
H 133 286.00 1634.00 Nicholas U. Mayall 4-meter Telescope NEWFIRM Use with 3103, 3203. These filters have never been used in NEWFIRM.
Stromgren y 285.00 5455.00 SOAR Telescope Goodman, SOI Stromgren y Stromgren y 4 x 4 Inches square filters for imaging with the Goodman HTS or with SOI (SOI can also use 3x3 inch filters without vignetting)
HeI-2p2s_G1120 284.00 20580.00 Gemini South GSAOI HeI-2p2s_G1120 HeI-2p2s_G1120
u Stromgren 280.00 3530.00 WIYN 3.5-meter Telescope Hydra SIZE: 4x4-9.15mm.
Hydra EC#14 280.00 4551.00 BLANK Hydra, Hydra Echelle Mode Hydra EC#14 Order: 12.25
u Stromgren 3530/280 280.00 3530.00 SMARTS Consortium: 0.9-meter Telescope BLANK u Stromgren 3530/280 u Stromgren 3530/280 Size: 4x4 Thick: 9.15
u Stromgren 280.00 3530.00 WIYN 3.5-meter Telescope Hydra SIZE: 4x4-9.15mm.
kp1453d 279.00 3532.00 KPNO 2.1-meter Telescope KPNO 2-Inch Filter kp1453d stromgren u 8mm ug11+1mmwg345

Updated on June 27, 2022, 11:32 am