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Filter Sets
Hi, Could anyone help?
I need to know the WCL, FWHM and peak transmition of : Deep sky H-Alpha filter OIII Infrared bands j, h, k and l Any help would be appreciated -- Jon |
#2
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Filter Sets
In article ,
Jon Yardley writes: Infrared bands j, h, k and l There are several different filter sets in use, but best modern practice is probably the Gemini set. Information at http://www.gemini.edu/documentation/...nts/pre73.html There are other relevant documents on the Gemini web site, which is easily searchable. Prior to the new Gemini filters, the "Barr" filter set was probably the most widely used. I think its specifications are probably on the Gemini site somewhere. You asked about the Sloan filters in sci.astro. Have you looked at the Sloan web site? -- Steve Willner Phone 617-495-7123 Cambridge, MA 02138 USA (Please email your reply if you want to be sure I see it; include a valid Reply-To address to receive an acknowledgement. Commercial email may be sent to your ISP.) |
#3
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Filter Sets
In article ,
Jon Yardley writes: Infrared bands j, h, k and l There are several different filter sets in use, but best modern practice is probably the Gemini set. Information at http://www.gemini.edu/documentation/...nts/pre73.html There are other relevant documents on the Gemini web site, which is easily searchable. Prior to the new Gemini filters, the "Barr" filter set was probably the most widely used. I think its specifications are probably on the Gemini site somewhere. You asked about the Sloan filters in sci.astro. Have you looked at the Sloan web site? -- Steve Willner Phone 617-495-7123 Cambridge, MA 02138 USA (Please email your reply if you want to be sure I see it; include a valid Reply-To address to receive an acknowledgement. Commercial email may be sent to your ISP.) |
#4
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Filter Sets
In article , Jon Yardley wrote:
Hi, Could anyone help? I need to know the WCL, FWHM and peak transmition of : Deep sky H-Alpha filter OIII Infrared bands j, h, k and l You might try a google search for astronomical filter manufacturers. Some of them provide online transmission data. For instance, OCLI (www.ocli.com) make infrared filters for astronomy, and transmission spectra for many of these filters are available on their website. Many observatories also make their filter data available on the web. Although I'm not particularly familiar with visible-wavelength filters, you should be aware that the numbers you ask for will vary depending on the specifics of the manufacturing process. Regarding infrared astronomy, the properties of J, H, K and L filters change slightly when the filters are subject to cryogenic temperatures, so depending on your own specific requirements, you might need to be careful about which data you use. |
#5
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Filter Sets
In article , Jon Yardley wrote:
Hi, Could anyone help? I need to know the WCL, FWHM and peak transmition of : Deep sky H-Alpha filter OIII Infrared bands j, h, k and l You might try a google search for astronomical filter manufacturers. Some of them provide online transmission data. For instance, OCLI (www.ocli.com) make infrared filters for astronomy, and transmission spectra for many of these filters are available on their website. Many observatories also make their filter data available on the web. Although I'm not particularly familiar with visible-wavelength filters, you should be aware that the numbers you ask for will vary depending on the specifics of the manufacturing process. Regarding infrared astronomy, the properties of J, H, K and L filters change slightly when the filters are subject to cryogenic temperatures, so depending on your own specific requirements, you might need to be careful about which data you use. |
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