1. Filters
2. Filters

Filters

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Telescope

- Any -BLANKGemini NorthGemini SouthKPNOKPNO 2.1-meter TelescopeNicholas U. Mayall 4-meter TelescopeSMARTS 1.3-meter TelescopeSMARTS Consortium: 0.9-meter TelescopeSOAR TelescopeVíctor M. Blanco 4-meter TelescopeWIYN 0.9-meter TelescopeWIYN 3.5-meter Telescope

Instrument

- Any -ALOPEKEANDICAMBLANKDark Energy CameraFlamingosFLAMINGOS2GMOS-NGMOS-SGNIRSGoldCamGoodmanGoodman, SOIGSAOIHydraHydra, Hydra Echelle ModeHydra, Hydra Schott GlassISPIKOSMOSKPNO 2-Inch FilterKPNO 4-Inch FiltersMosaicNEWFIRMNIRIPhoenixRC SpectrographS2KBSAM, SAM-FPSAM, SAMISPARTAN IRWHIRCZORRO

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Filter	FWHM (Å)	CWL (Å)	Telescope	Instrument	Plot	Data	Comments
815 815_v1 k1026			Nicholas U. Mayall 4-meter Telescope	Mosaic	815 815_v1 k1026	815 815_v1 k1026	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) and the CTIO 4m (f/2.9). At the KPNO 4m f/3.1 the properties of this filter are: CWL=8087A, FWHM=71A, PEAK TRANSMISSION=93%.
Un Steidel k1041	562.72	3479.17	Nicholas U. Mayall 4-meter Telescope	Mosaic	Un Steidel k1041	Un Steidel k1041	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.
823 823_v2 k1047			Nicholas U. Mayall 4-meter Telescope	Mosaic	823 823_v2 k1047	823 823_v2 k1047	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= 8193.49A FWHM= 68.30A PEAK TRANSMISSION= 89.71% at 8182A
607 BATC k1058 **			Nicholas U. Mayall 4-meter Telescope	Mosaic	607 BATC k1058 **	607 BATC k1058 **
B Harris c6002	990.00	4360.00	Nicholas U. Mayall 4-meter Telescope	Mosaic	B Harris c6002	B Harris c6002	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.
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.
H 127	286.00	1627.00	Nicholas U. Mayall 4-meter Telescope	NEWFIRM		H 127	Use with 3103, 3203
KP811	88.46	6563.62	Nicholas U. Mayall 4-meter Telescope	KOSMOS	KP811	KP811	KOSMOS Approved KPNO 4in. Filter.
BG-39	2424.35	4736.60	Nicholas U. Mayall 4-meter Telescope	RC Spectrograph	BG-39	BG-39	Bandpass Filter.
OG-570	0.00	0.00	Nicholas U. Mayall 4-meter Telescope	RC Spectrograph	OG-570	OG-570	Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
V Harris k1003			Nicholas U. Mayall 4-meter Telescope	Mosaic	V Harris k1003
ha4 H-alpha+4nm k1010			Nicholas U. Mayall 4-meter Telescope	Mosaic	ha4 H-alpha+4nm k1010	ha4 H-alpha+4nm k1010	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=6593A, FWHM=81A, PEAK TRANSMISSION=91.1%.
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.
823 823_v1 k1027	70.61	8232.04	Nicholas U. Mayall 4-meter Telescope	Mosaic	823 823_v1 k1027	823 823_v1 k1027	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. Note: In December 2003 a replacement for this filter (k1047) was purchased. See below for a comparison of the two filters.
Un Steidel k1041			Nicholas U. Mayall 4-meter Telescope	Mosaic	Un Steidel k1041	Un Steidel k1041
337 BATC k1051 **			Nicholas U. Mayall 4-meter Telescope	Mosaic	337 BATC k1051 **	337 BATC k1051 **	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.
666 BATC k1059 **			Nicholas U. Mayall 4-meter Telescope	Mosaic	666 BATC k1059 **	666 BATC k1059 **	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.
V Harris c6026	940.00	5370.00	Nicholas U. Mayall 4-meter Telescope	Mosaic	V Harris c6026	V Harris c6026	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.
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.
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.
KP1390	72.39	6577.44	Nicholas U. Mayall 4-meter Telescope	KOSMOS	KP1390	KP1390	KOSMOS Approved KPNO 4in. Filter.
4-96	1643.57	4720.96	Nicholas U. Mayall 4-meter Telescope	RC Spectrograph	4-96	4-96	Bandpass Filter.
OG-590b	0.00	0.00	Nicholas U. Mayall 4-meter Telescope	RC Spectrograph	OG-590b	OG-590b	Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
R Harris k1004	1511.30	6513.54	Nicholas U. Mayall 4-meter Telescope	Mosaic	R Harris k1004	R Harris k1004	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.
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.
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%
823 823_v1 k1027			Nicholas U. Mayall 4-meter Telescope	Mosaic	823 823_v1 k1027	823 823_v1 k1027
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.
337 BATC k1051 **			Nicholas U. Mayall 4-meter Telescope	Mosaic	337 BATC k1051 **	337 BATC k1051 **
666 BATC k1059 **			Nicholas U. Mayall 4-meter Telescope	Mosaic	666 BATC k1059 **	666 BATC k1059 **
R Harris c6004	1510.00	6440.00	Nicholas U. Mayall 4-meter Telescope	Mosaic	R Harris c6004	R Harris c6004	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.
Bj Tyson c6024 *** Not Available	1650.00	4350.00	Nicholas U. Mayall 4-meter Telescope	Mosaic	Bj Tyson c6024 *** Not Available	Bj Tyson c6024 *** Not Available	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.
1056 nm, 1056	0.74	1056.37	Nicholas U. Mayall 4-meter Telescope	NEWFIRM		1056 nm, 1056	Use with 1403
H + K blocker	1320.00	2030.00	Nicholas U. Mayall 4-meter Telescope	NEWFIRM		H + K blocker	Use with 3101, 3102
KP1391	68.39	6608.47	Nicholas U. Mayall 4-meter Telescope	KOSMOS	KP1391	KP1391	KOSMOS Approved KPNO 4in. Filter.
KG-2	0.00	0.00	Nicholas U. Mayall 4-meter Telescope	RC Spectrograph	KG-2	KG-2	Bandpass Filter.
RG-610	0.00	0.00	Nicholas U. Mayall 4-meter Telescope	RC Spectrograph	RG-610	RG-610	Sharp-Cut Filter. Cutoff filter: no transmission peak, FWHM is undefined.
R Harris k1004			Nicholas U. Mayall 4-meter Telescope	Mosaic	R Harris k1004	R Harris k1004
ha8 H-alpha+8nm k1011			Nicholas U. Mayall 4-meter Telescope	Mosaic	ha8 H-alpha+8nm k1011	ha8 H-alpha+8nm k1011	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=6634A, FWHM=81A, PEAK TRANSMISSION=89.2%.
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.
823 823_v1 k1027			Nicholas U. Mayall 4-meter Telescope	Mosaic	823 823_v1 k1027		A comparison of this filter with the newer version (k1047):
Rs Steidel k1043	1048.78	6975.13	Nicholas U. Mayall 4-meter Telescope	Mosaic	Rs Steidel k1043	Rs Steidel k1043	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.
390 BATC k1052 **			Nicholas U. Mayall 4-meter Telescope	Mosaic	390 BATC k1052 **	390 BATC k1052 **	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.
705 BATC k1060 **			Nicholas U. Mayall 4-meter Telescope	Mosaic	705 BATC k1060 **	705 BATC k1060 **	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.
I c6028	1500.00	8050.00	Nicholas U. Mayall 4-meter Telescope	Mosaic	I c6028	I c6028	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.
It Tyson I c6025 *** Not Available	2000.00	8800.00	Nicholas U. Mayall 4-meter Telescope	Mosaic	It Tyson I c6025 *** Not Available	It Tyson I c6025 *** Not Available	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.
1063 nm, 1063	0.81	1063.09	Nicholas U. Mayall 4-meter Telescope	NEWFIRM		1063 nm, 1063	Use with 1403
HX	308.00	1631.00	Nicholas U. Mayall 4-meter Telescope	NEWFIRM		HX
KP1494	86.37	6647.82	Nicholas U. Mayall 4-meter Telescope	KOSMOS	KP1494	KP1494	KOSMOS Approved KPNO 4in. Filter.
KG-3	0.00	0.00	Nicholas U. Mayall 4-meter Telescope	RC Spectrograph	KG-3	KG-3	Bandpass Filter.

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