{"id":8030,"date":"2017-08-29T11:33:50","date_gmt":"2017-08-29T11:33:50","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=8030"},"modified":"2017-09-15T19:00:53","modified_gmt":"2017-09-15T19:00:53","slug":"matisse-linstrument-francais-va-equiper-vlt","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/08\/29\/matisse-linstrument-francais-va-equiper-vlt\/","title":{"rendered":"MATISSE, l&#8217;instrument fran\u00e7ais qui va \u00e9quiper le VLT"},"content":{"rendered":"<p><strong>C&#8217;est \u00e0 l&#8217;Observatoire de Nice qu&#8217;a \u00e9t\u00e9 construit MATISSE, un instrument qui va permettre de combiner les images obtenues par les 4 t\u00e9lescopes du VLT.\u00a0<\/strong><\/p>\n<p>C&#8217;est dans le d\u00e9sert chilien d&#8217;Atacama que\u00a0l&#8217;Observatoire europ\u00e9en austral (<a href=\"https:\/\/www.eso.org\/public\/\" target=\"_blank\" rel=\"noopener noreferrer\">ESO<\/a>) a d\u00e9cid\u00e9 d&#8217;implanter le <em>Very Large Telescope<\/em> dans les ann\u00e9es 1990 en compl\u00e9ment de l&#8217;<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/01\/12\/file-detoiles-crepuscule-lobservatoire-de-silla\/\" target=\"_blank\" rel=\"noopener noreferrer\">Observatoire de la Silla<\/a> lanc\u00e9 30 ans plus t\u00f4t. Le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/01\/17\/vlt-observatoire-desert-atacama\/\" target=\"_blank\" rel=\"noopener noreferrer\">VLT<\/a>\u00a0est un ensemble de 4 t\u00e9lescopes de 8 m\u00e8tres de diam\u00e8tre et de 4 t\u00e9lescopes auxiliaires de 1,8 m\u00e8tre qui peuvent \u00eatre utilis\u00e9s s\u00e9par\u00e9ment mais qu&#8217;on peut aussi coupler dans sa version interf\u00e9rom\u00e9trique, le <a href=\"https:\/\/www.eso.org\/sci\/facilities\/paranal\/telescopes\/vlti.html\" target=\"_blank\" rel=\"noopener noreferrer\">VLTI<\/a> (<em>Very Large Telescope Interferometer<\/em>).<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/vlt.jpg\" rel=\"lightbox[8030]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-8032\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/vlt-450x240.jpg\" alt=\"\" width=\"450\" height=\"240\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/vlt-450x240.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/vlt-768x410.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/vlt-1024x546.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/vlt.jpg 1687w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>La technique de l&#8217;interf\u00e9rom\u00e9trie consiste \u00e0 m\u00e9langer les faisceaux provenant de plusieurs t\u00e9lescopes, ce qui permet d&#8217;obtenir la r\u00e9solution d&#8217;un instrument virtuel dont le diam\u00e8tre est \u00e9gal \u00e0 la distance s\u00e9parant les t\u00e9lescopes (dans le cas du VLT cette distance est de 200 m).<!--more--><\/p>\n<p>Jusqu&#8217;\u00e0 pr\u00e9sent on pouvait combiner 2 t\u00e9lescopes du VLT dans la bande de 8 \u00e0 13 microns avec l&#8217;instrument <a href=\"https:\/\/www.eso.org\/sci\/facilities\/paranal\/decommissioned\/midi.html\" target=\"_blank\" rel=\"noopener noreferrer\">MIDI<\/a> et 3 dans la bande de 1,1 \u00e0 2,4 microns avec l&#8217;instrument <a href=\"http:\/\/www.eso.org\/sci\/facilities\/paranal\/instruments\/amber.html\" target=\"_blank\" rel=\"noopener noreferrer\">AMBER<\/a>. Gr\u00e2ce \u00e0 MATISSE (<em>Multi AperTure mid-Infrared SpectroScopic Experiment<\/em>)\u00a0il sera d\u00e9sormais possible\u00a0de combiner simultan\u00e9ment les donn\u00e9es de 4 t\u00e9lescopes dans le domaine spectral de l\u2019infrarouge moyen, entre 3 et 13 microns, ce qui permettra d&#8217;\u00e9tudier la formation des tr\u00e8s jeunes syst\u00e8mes plan\u00e9taires cach\u00e9s dans la poussi\u00e8re de la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/03\/02\/voie-lactee-se-leve-arches-national-park\/\" target=\"_blank\" rel=\"noopener noreferrer\">Voie lact\u00e9e<\/a>.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/matisse2.jpg\" rel=\"lightbox[8030]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-8031\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/matisse2-450x338.jpg\" alt=\"\" width=\"450\" height=\"338\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/matisse2-450x338.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/matisse2-768x576.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/matisse2.jpg 960w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>C&#8217;est dans les sous-sols du v\u00e9n\u00e9rable <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/11\/20\/la-grande-lunette-de-lobservatoire-de-nice\/\" target=\"_blank\" rel=\"noopener noreferrer\">Observatoire de Nice<\/a> qu&#8217;a \u00e9t\u00e9 patiemment construit MATISSE pendant une d\u00e9cennie : 5 ans pour imaginer l&#8217;instrument et 5 ans pour concevoir, assembler et tester les diff\u00e9rents \u00e9l\u00e9ments (d\u00e9tecteurs infrarouges, cryostats, bloc optique compos\u00e9 notamment de 200 petits miroirs actionn\u00e9s par des moteurs&#8230;).<\/p>\n<figure id=\"attachment_8036\" aria-describedby=\"caption-attachment-8036\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/oca2.jpg\" rel=\"lightbox[8030]\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-8036 size-medium\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/oca2-450x381.jpg\" alt=\"\" width=\"450\" height=\"381\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/oca2-450x381.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/oca2.jpg 700w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-8036\" class=\"wp-caption-text\">Une partie de l&#8217;\u00e9quipe qui a travaill\u00e9 sur la conception et la r\u00e9alisation de MATISSE.<\/figcaption><\/figure>\n<p>L&#8217;instrument \u00e9tant d\u00e9sormais op\u00e9rationnel, il va \u00eatre enti\u00e8rement d\u00e9mont\u00e9 puis emball\u00e9 avant de partir au mois d&#8217;octobre en direction du Chili o\u00f9 il sera ensuite remont\u00e9.<\/p>\n<figure id=\"attachment_8034\" aria-describedby=\"caption-attachment-8034\" style=\"width: 450px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/oca1.jpg\" rel=\"lightbox[8030]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-8034\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/oca1-450x300.jpg\" alt=\"\" width=\"450\" height=\"300\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/oca1-450x300.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/07\/oca1.jpg 600w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-8034\" class=\"wp-caption-text\">MATISSE (\u00e0 droite) en phase de tests.<\/figcaption><\/figure>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>C&#8217;est \u00e0 l&#8217;Observatoire de Nice qu&#8217;a \u00e9t\u00e9 construit MATISSE, un instrument qui va permettre de combiner les images obtenues par les 4 t\u00e9lescopes du VLT.\u00a0 C&#8217;est dans le d\u00e9sert chilien d&#8217;Atacama que\u00a0l&#8217;Observatoire europ\u00e9en austral (ESO) a d\u00e9cid\u00e9 d&#8217;implanter le Very Large Telescope dans les ann\u00e9es 1990 en compl\u00e9ment de l&#8217;Observatoire de la Silla lanc\u00e9 30 &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/08\/29\/matisse-linstrument-francais-va-equiper-vlt\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">MATISSE, l&#8217;instrument fran\u00e7ais qui va \u00e9quiper le VLT<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":8036,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[2271,635,634,633,2269,2270,1326,637,1223],"class_list":["post-8030","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-amber","tag-chili","tag-desert-datacama","tag-eso","tag-matisse","tag-midi","tag-observatoire-de-nice","tag-vlt","tag-vlti"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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