{"id":330,"date":"2010-08-31T19:41:32","date_gmt":"2010-08-31T19:41:32","guid":{"rendered":"http:\/\/bcmeteors.net\/wp\/2010\/08\/31\/the-spectrographs-used-by-ed-majden\/"},"modified":"2010-08-31T19:41:32","modified_gmt":"2010-08-31T19:41:32","slug":"the-spectrographs-used-by-ed-majden","status":"publish","type":"post","link":"https:\/\/bcmeteors.net\/?p=330","title":{"rendered":"The Spectrographs used by Ed Majden"},"content":{"rendered":"

Here is some of the spectral equipment in use at EMO.<\/p>\n<\/p>\n

F-24 Aero Camera lens cone with an f-2.9 – 8 inch f.l Pentac lens fitted with a 27 deg 45′ objective prism with a refractive index of 1.71 for the 589 nm line. This unit has been modified to accept a 4X5 inch 6 platen Graphmatic film holder.<\/p>\n

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\"Two<\/p>\n

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Two, 2-1\/4 X 2-1\/4 inch roll film type cameras mounted with objective transmission gratings behind a chopping shutter.\u00a0 The grey Camera is a Bronica and the other is a Hasselblad. An automatic system using used Hasselblad EL\/M motor driven cameras is being worked on.<\/p>\n

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\"Video<\/p>\n

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This is a video image intensifier spectrograph recording system using a 2nd generation 25 mm MCP Image intensifier and a Canon L2 Super 8 – 1\/2 inch format video camera. Such a system will record spectra as faint as +3.0 magnitude where photographic systems using film with standard lenses are limited to meteors brighter than -2.0 magnitude. This unit is still under construction. I have recorded several video spectra of Perseids and Leonids with a prototype system. Copies have been sent to Peter Jenniskens at SETI\/NASA for his meteor spectra archives. Hopefully they will eventually be measured. Since 9\/11 it is unfortunately difficult to get U.S. built 2nd and 3rd generation intensifiers unless you are a U.S. resident.<\/p>\n

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Here is some of the spectral equipment in use at EMO. F-24 Aero Camera lens cone with an f-2.9 – 8 inch f.l Pentac lens fitted with a 27 deg 45′ objective prism with a refractive index of 1.71 for the 589 nm line. This unit has been modified to accept a 4X5 inch 6 … Continue reading “The Spectrographs used by Ed Majden”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":327,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[58],"tags":[],"class_list":["post-330","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-spectroscopy-methods"],"_links":{"self":[{"href":"https:\/\/bcmeteors.net\/index.php?rest_route=\/wp\/v2\/posts\/330","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bcmeteors.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bcmeteors.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bcmeteors.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bcmeteors.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=330"}],"version-history":[{"count":0,"href":"https:\/\/bcmeteors.net\/index.php?rest_route=\/wp\/v2\/posts\/330\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bcmeteors.net\/index.php?rest_route=\/wp\/v2\/media\/327"}],"wp:attachment":[{"href":"https:\/\/bcmeteors.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=330"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bcmeteors.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=330"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bcmeteors.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}