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margin: 0; width: 100%; } } .home h1.entry-title { display: none; margin-bottom: 0; } .home h2.entry-title { display: none; margin-bottom: 0; } .entry-header::after { display: block; margin: 0 auto 0px; padding-bottom: 0px; width: 10%; border-bottom: none; } #text-6 .textwidget { padding-bottom: 5rem; } .home-section-2 { background-color: #f5f5f5; } #text-13 .widget-wrap a { font-weight: 600; color: #00A0B2; } #text-13 .widget-wrap { font-size: 2.6rem; text-align: left; line-height: 150%; color: #999; } /* ---- HOME Highlights ---- */ #highlights { display: flex; flex-wrap: wrap; align-content: flex-start; justify-content: center; margin-top: -80px; padding-bottom: 0%; } #highlights a { flex-grow: 1; flex-basis: 255px; max-width: 300px; margin: 10px; } #highlights img { width: 100%; } #highlights h3 { font-size: 2.6rem; font-weight: 600; } .home-even .wrap, .home-odd .wrap { max-width: 980px; padding-left: 20px; padding-right: 20px; } p.more-from-category { display: none; } .one-half { padding: 3%; background: black; /* For browsers that do not support gradients */ background: linear-gradient(to bottom, rgba(0,0,0,.1), rgba(0,0,0,.8), rgba(0,0,0,.3)); /* Standard syntax (must be last) */ } .two-sixths { padding: 3%; background: black; /* For browsers that do not support gradients */ background: linear-gradient(to bottom, rgba(0,0,0,.1), rgba(0,0,0,.8), rgba(0,0,0,.3)); /* Standard syntax (must be last) */ } .one-sixth { padding: 3%; background: black; /* For browsers that do not support gradients */ background: linear-gradient(to bottom, rgba(0,0,0,.1), rgba(0,0,0,.8), rgba(0,0,0,.3)); /* Standard syntax (must be last) */ } .home-even.home-section-4.widget-area { background-color: #f8f8f8; margin-top: 0; padding-top: 40px; } .home h2 { font-size: 3.5rem; } .home-section-1 p { font-size: 2.0rem; } .home-section-2 h3.widgettitle.widget-title { display: none; } .home-section-2 h1 { font-size: 4.0rem; } .home-section-2.widget-area { margin-bottom: -60pt; } /* ---- HOME News ---- */ .home-section-4.widget-area { background-color: #f5f5f5; margin-top: 2%; margin-bottom: -100pt; } .home-section-4 h3.widgettitle.widget-title { font-size: 4.0rem; margin-bottom: 30pt; } .home-section-4 h4 { margin-top: -30pt; margin-bottom: -30pt; font-size: 2.0rem; } /* ---- HOME Sponsors ---- */ #custom_html-6 > div { display: flex; } ul.sponsor { display: flex; flex-wrap: wrap; list-style-type: none; align-items: center; justify-content: space-around; } li.sponsor-item { flex: 0 0 35%; margin: 20px; list-style-type: none; } li.sponsor-page-item { flex: 0 0 45%; margin: 12px; list-style-type: none; } .entry-content ul > li.sponsor-item { list-style-type: none; } .entry-content ul > li.sponsor-page-item { list-style-type: none; } @media only screen and (max-width: 800px) { ul.sponsor { flex-direction: column; flex-wrap: wrap; flex: 0 1 180px; align-items: center; max-width: 350px } .post-102 .entry-content p { text-align: center; } li.sponsor-item { margin: 30px; } } #custom_html-6 h3 { color: #999; padding-bottom: 20px; } #text-9 h3 { font-size: 3.3rem; color: #999; } /* CATEGORY -- ARCHIVE */ .category h2 { font-size: 18px; } .category article { margin-bottom: auto } .category div.site-inner { margin-bottom: 10%; } .category #genesis-sidebar-primary.sidebar.sidebar-primary.widget-area { margin-top: 160px; } .category-meet-a-desi-member h2 { font-size: 26px; font-weight: 700; padding-top: 20px; border-top: 2px solid #dedede; } .entry-header, .entry-title a { color: #00a0af; text-align: left; padding-bottom: 1%; font-weight: 600; font-size: 2.6rem;} .archive #genesis-sidebar-primary { background-color: #f8f8f8; padding: 0px; margin-top: 15%; } .archive #genesis-sidebar-primary h3.widget-title { font-size: 2rem; font-weight: 500; padding-bottom: 10px; } .archive #genesis-sidebar-primary h4.entry-title { font-size: 3rem; color: #00a0af; margin-bottom: 0; } .archive .sidebar .entry-title a { font-size: 2rem; color: #00a0af; margin-bottom: 0; } /* ARCHIVE PAGES */ .archive-description, .author-box { border-bottom: none; border-top: none; } .archive-title { font-size: 4.667rem; color: #333; font-weight: 500; line-height: 1; margin-bottom: 0; text-align: left; } .archive-description, .author-box { margin-bottom: 30px; } /* SIDEBAR */ .sidebar li { font-family: open-sans, sans-serif; font-size: 100%; line-height: 1.25; margin-bottom: 5%} .sidebar a:visited { color: #999; } ul#menu-blog, ul#menu-blog-spanish, ul#menu-collaboration, ul#menu-education-outreach, ul#menu-for-scientists, ul#menu-gallery, ul#menu-instrument, ul#menu-instrument-catalan, ul#menu-instrument-italian, ul#menu-instrument-spanish, ul#menu-meet-a-member, ul#menu-meet-a-member-spanish, ul#menu-press, ul#menu-science, ul#menu-science-catalan, ul#menu-science-chinese, ul#menu-science-english, ul#menu-science-french, ul#menu-science-georgian, ul#menu-science-german, ul#menu-science-italian, ul#menu-science-korean, ul#menu-science-portuguese, ul#menu-science-spanish { background-color: #f8f8f8; padding: 8%; } #nav_menu-17 { background-color: #f8f8f8; padding: 8%; } #nav_menu-17 h3 { margin-bottom: 0; } /* PAGES */ h1.entry-title { font-size: 4.8rem; margin-bottom: 6%; text-align: left; } div.photo-summary img { margin-bottom: 4%; } /* FULL-WIDTH */ .full-width .content { padding-right: 0px; font-size: 1.8rem; font-family: open-sans, sans-serif; } .full-width h1.entry-title { padding-left: 0px; } /* MISC */ .institute { font-weight: bold; color: #099; } hr { border-bottom: 1px solid #ddd; } /* EXTERNAL LINKS */ a.ext:after, .ext a:after, h3.ext:after { content: ''; display: inline-block; /* float: right; */ margin-left: 10px; width: 12px; height: 12px; background-image: url(/wp-content/uploads/sites/8/2018/06/ext-1.png); background-size: 24px 12px; background-repeat: no-repeat; background-position: -12px 0; } a.ext.white:after, .ext.white a:after, a.ext:hover:after, .ext a:hover:after { background-position:0 0; } .home-middle .ext:after, .entry-title-link.ext:after { content: ''; display: inline-block; width: 12px; height: 12px; background-image: url(images/ext.png); background-size:24px 12px; background-repeat:no-repeat; background-position:-12px 0; margin-left:8px; float:none; } /* ---- Flex Gallery ---- */ .children { display: flex; flex-flow: row wrap; justify-content: space-around; min-height: 200px; } .child { flex: 0 0 auto; list-style-type: none; width: 30%; padding: 25px; border: solid 1px #ddd; font-size: 1.6rem; } .child a { background-color: #fff; display: block; padding: 0; background-repeat: no-repeat; background-size: contain; background-position: center top; color: #333333; text-decoration: none; text-align: center; position: relative; } .child h3 { text-decoration: none; text-align: center; font-size: 2.3rem; font-weight: 600; /* letter-spacing: 3px; */ color: #fff; line-height: 0; margin-bottom: 0; } /* ---- FOOTER ---- */ .social-links img { height: 40px; padding-right: 20px; } a.footer-button { color: white; padding: 16px; text-align: center; text-decoration: none; display: inline-block; font-size: 16px; margin: 4px 30px 30px 0px; cursor: pointer; border-radius: 8px; border: 1px solid #fff; } .site-footer { display: none; } .footer-widgets a { text-decoration: none; display: inline; } footer .footer-social { margin: 36px 0 24px 0; padding: 0; font-size: 30px; text-align: center; } .copyright { font-size: 70%; padding-top: 20px; } .wp-caption-text { margin-top: 8px; }</style></head> <body class="page-template-default page page-id-2905 page-child parent-pageid-2904 custom-header header-image content-sidebar genesis-breadcrumbs-hidden genesis-footer-widgets-visible" itemscope itemtype="https://schema.org/WebPage"><div class="site-container"><ul class="genesis-skip-link"><li><a href="#genesis-content" class="screen-reader-shortcut"> Skip to main content</a></li><li><a href="#genesis-sidebar-primary" class="screen-reader-shortcut"> Skip to primary sidebar</a></li><li><a href="#genesis-footer-widgets" class="screen-reader-shortcut"> Skip to footer</a></li></ul><header class="site-header" itemscope itemtype="https://schema.org/WPHeader"><div class="wrap"><div class="title-area"><p class="site-title" itemprop="headline"><a href="https://www.desi.lbl.gov/it/">Dark Energy Spectroscopic Instrument (DESI)</a></p></div><div class="widget-area header-widget-area"><section id="nav_menu-20" class="widget widget_nav_menu"><div class="widget-wrap"><nav class="nav-header" itemscope itemtype="https://schema.org/SiteNavigationElement"><ul id="menu-main-navigation" class="menu genesis-nav-menu js-superfish"><li id="menu-item-59" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-59"><a href="https://www.desi.lbl.gov/science/" itemprop="url"><span itemprop="name">/ science /</span></a> <ul class="sub-menu"> <li id="menu-item-994" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-994"><a href="https://www.desi.lbl.gov/science/" itemprop="url"><span itemprop="name">science overview</span></a></li> <li id="menu-item-77" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-77"><a href="https://www.desi.lbl.gov/cosmology-and-dark-energy/" itemprop="url"><span itemprop="name">cosmology and dark energy</span></a></li> <li id="menu-item-80" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-80"><a href="https://www.desi.lbl.gov/redshifts-and-distance/" itemprop="url"><span itemprop="name">redshifts and distance</span></a></li> <li id="menu-item-79" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-79"><a href="https://www.desi.lbl.gov/mapping-the-universe/" itemprop="url"><span itemprop="name">mapping the universe</span></a></li> <li id="menu-item-81" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-81"><a href="https://www.desi.lbl.gov/the-desi-science-mission/" itemprop="url"><span itemprop="name">the DESI science mission</span></a></li> <li id="menu-item-82" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-82"><a href="https://www.desi.lbl.gov/the-desi-survey/" itemprop="url"><span itemprop="name">the DESI survey</span></a></li> <li id="menu-item-78" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-78"><a href="https://www.desi.lbl.gov/imaging-surveys/" itemprop="url"><span itemprop="name">imaging surveys</span></a></li> </ul> </li> <li id="menu-item-60" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-60"><a href="https://www.desi.lbl.gov/instrument/" itemprop="url"><span itemprop="name">/ instrument /</span></a> <ul class="sub-menu"> <li id="menu-item-997" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-997"><a href="https://www.desi.lbl.gov/instrument/" itemprop="url"><span itemprop="name">instrument overview</span></a></li> <li id="menu-item-98" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-98"><a href="https://www.desi.lbl.gov/telescope/" itemprop="url"><span itemprop="name">telescope</span></a> <ul class="sub-menu"> <li id="menu-item-1790" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-1790"><a href="https://www.desi.lbl.gov/tohono-oodham/" itemprop="url"><span itemprop="name">tohono o’odham</span></a></li> </ul> </li> <li id="menu-item-92" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-92"><a href="https://www.desi.lbl.gov/corrector/" itemprop="url"><span itemprop="name">corrector</span></a></li> <li id="menu-item-95" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-95"><a href="https://www.desi.lbl.gov/focal-plane-system/" itemprop="url"><span itemprop="name">focal plane system</span></a></li> <li id="menu-item-94" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-94"><a href="https://www.desi.lbl.gov/fiber-system/" itemprop="url"><span itemprop="name">fiber system</span></a></li> <li id="menu-item-97" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-97"><a href="https://www.desi.lbl.gov/spectrograph/" itemprop="url"><span itemprop="name">spectrograph</span></a></li> <li id="menu-item-96" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-96"><a href="https://www.desi.lbl.gov/instrument-control-system/" itemprop="url"><span itemprop="name">instrument control system</span></a></li> <li id="menu-item-93" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-93"><a href="https://www.desi.lbl.gov/data-systems/" itemprop="url"><span itemprop="name">data systems</span></a></li> <li id="menu-item-91" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-91"><a href="https://www.desi.lbl.gov/bringing-desi-to-life/" itemprop="url"><span itemprop="name">bringing DESI to life</span></a> <ul class="sub-menu"> <li id="menu-item-212" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-212"><a href="https://www.desi.lbl.gov/bringing-desi-to-life/commissioning-instrument/" itemprop="url"><span itemprop="name">commissioning Instrument</span></a></li> <li id="menu-item-213" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-213"><a href="https://www.desi.lbl.gov/bringing-desi-to-life/protodesi/" itemprop="url"><span itemprop="name">protoDESI</span></a></li> </ul> </li> </ul> </li> <li id="menu-item-61" class="collaboration menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-61"><a href="https://www.desi.lbl.gov/collaboration/" itemprop="url"><span itemprop="name">/ collaboration /</span></a> <ul class="sub-menu"> <li id="menu-item-169" class="ext menu-item menu-item-type-custom menu-item-object-custom menu-item-169"><a href="https://desi.lbl.gov/trac/wiki/PublicPages/Contacts" itemprop="url"><span itemprop="name">DESI team</span></a></li> <li id="menu-item-1020" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-1020"><a href="https://www.desi.lbl.gov/collaboration/desi-builders/" itemprop="url"><span itemprop="name">DESI builders</span></a></li> <li id="menu-item-113" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-113"><a href="https://www.desi.lbl.gov/collaborating-institutions/" itemprop="url"><span itemprop="name">collaborating institutions</span></a></li> <li id="menu-item-112" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-112"><a href="https://www.desi.lbl.gov/sponsors/" itemprop="url"><span itemprop="name">sponsors</span></a></li> <li id="menu-item-111" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-111"><a href="https://www.desi.lbl.gov/vendors/" itemprop="url"><span 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menu-item-type-taxonomy menu-item-object-category menu-item-726"><a href="https://www.desi.lbl.gov/category/news/" itemprop="url"><span itemprop="name">in the news</span></a></li> <li id="menu-item-727" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-727"><a href="https://www.desi.lbl.gov/category/press-releases/" itemprop="url"><span itemprop="name">press releases</span></a></li> <li id="menu-item-1113" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-1113"><a href="https://www.desi.lbl.gov/category/blog/" itemprop="url"><span itemprop="name">blog</span></a></li> <li id="menu-item-367" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-367"><a href="https://twitter.com/desisurvey?ref_src=twsrc%5Etfw" itemprop="url"><span itemprop="name">tweets by desisurvey</span></a></li> <li id="menu-item-1159" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-1159"><a href="https://www.desi.lbl.gov/acknowledgements/" itemprop="url"><span itemprop="name">acknowledgments</span></a></li> </ul> </li> <li id="menu-item-366" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-366"><a href="/photos/" itemprop="url"><span itemprop="name">/ galleries /</span></a> <ul class="sub-menu"> <li id="menu-item-133" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-133"><a href="https://www.desi.lbl.gov/photos/" itemprop="url"><span itemprop="name">image gallery</span></a></li> <li id="menu-item-132" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-132"><a href="https://www.desi.lbl.gov/videos/" itemprop="url"><span itemprop="name">videos</span></a></li> </ul> </li> <li id="menu-item-209" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-209"><a href="/for-scientists/" itemprop="url"><span itemprop="name">/ for scientists /</span></a> <ul class="sub-menu"> <li id="menu-item-3401" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-3401"><a href="https://data.desi.lbl.gov/doc" itemprop="url"><span itemprop="name">data releases</span></a></li> <li id="menu-item-208" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-208"><a href="https://www.desi.lbl.gov/for-scientists/instrument-design/" itemprop="url"><span itemprop="name">instrument design</span></a></li> <li id="menu-item-1512" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-1512"><a href="https://www.desi.lbl.gov/for-scientists/imaging-data/" itemprop="url"><span itemprop="name">imaging data</span></a></li> <li id="menu-item-3043" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-3043"><a href="https://www.desi.lbl.gov/for-scientists/target-selection-and-survey-validation/" itemprop="url"><span itemprop="name">target selection and survey 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href="https://www.desi.lbl.gov/es/bringing-desi-to-life/commissioning-instrument-spanish"><img decoding="async" class="alignleft" src="https://www.desi.lbl.gov/wp-content/uploads/sites/8/2019/12/spanish-1-e1576602273893.png" width="50" height="50" /></a><a href="https://www.desi.lbl.gov/ca/bringing-desi-to-life/commissioning-instrument-catalan"><img decoding="async" class="alignleft" src="https://www.desi.lbl.gov/wp-content/uploads/sites/8/2021/08/3253480-catalonia-icon-flag_106770-e1629935057530.png" width="50" height="50" /></a></p> <p> </p> <p><span style="font-weight: 400">Lo strumento di collaudo di DESI ha dato il via al processo di messa in funzione di DESI compiendo analisi semplici ma indispensabili al corretto funzionamento di DESI. Ha consentito di testare con successo il sistema di controllo del telescopio (Telescope Control System, TCS), la guida del telescopio, il sistema di ottimizzazione delle immagini e l’algoritmo “Platemaker” di DESI per la mappatura da coordinate celesti a coordinate dei posizionatori delle fibre.</span></p> <figure id="attachment_938" aria-describedby="caption-attachment-938" style="width: 600px" class="wp-caption aligncenter"><img loading="lazy" decoding="async" class="wp-image-938 size-medium" src="https://www.desi.lbl.gov/wp-content/uploads/sites/8/2019/10/IMG_3435-600x400.jpg" alt="" width="600" height="400" srcset="https://www.desi.lbl.gov/wp-content/uploads/sites/8/2019/10/IMG_3435-600x400.jpg 600w, https://www.desi.lbl.gov/wp-content/uploads/sites/8/2019/10/IMG_3435-768x512.jpg 768w, https://www.desi.lbl.gov/wp-content/uploads/sites/8/2019/10/IMG_3435-1024x683.jpg 1024w" sizes="auto, (max-width: 600px) 100vw, 600px" /><figcaption id="caption-attachment-938" class="wp-caption-text">Intero strumento di collaudo installato sul telescopio Mayall e pronto al funzionamento alla vigilia della fase collaudo, iniziata il 1 aprile 2019.</figcaption></figure> <p><span style="font-weight: 400">Lo strumento di collaudo è stato installato sul piano focale di DESI, dietro il correttore, nella primavera del 2019. La sua superf</span><span style="font-weight: 400">icie consisteva di cinque sensori CCD e 22 fibre di riferimento retroilluminate posizionate in punti strategici per il funzionamento dell’algoritmo Platemaker. </span><span style="font-weight: 400">Un alto cilindro d’acciaio proteggeva la superficie. Per poter operare in condizioni realistiche l’intero strumento di collaudo è stato disegnato in modo da riprodurre la reale distribuzione di massa del sistema del piano focale DESI. </span></p> <figure id="attachment_455" aria-describedby="caption-attachment-455" style="width: 447px" class="wp-caption aligncenter"><a href="https://www.desi.lbl.gov/wp-content/uploads/sites/8/2018/07/fpa.png"><img loading="lazy" decoding="async" class="wp-image-455 size-full" src="https://www.desi.lbl.gov/wp-content/uploads/sites/8/2018/07/fpa.png" alt="" width="447" height="356" /></a><figcaption id="caption-attachment-455" class="wp-caption-text">Superficie focale dello strumento di collaudo con 5 fotocamere CCD e 22 fibre di riferimento.</figcaption></figure> <figure id="attachment_456" aria-describedby="caption-attachment-456" style="width: 466px" class="wp-caption aligncenter"><a href="https://www.desi.lbl.gov/wp-content/uploads/sites/8/2018/07/layout.png"><img loading="lazy" decoding="async" class="wp-image-456 size-full" src="https://www.desi.lbl.gov/wp-content/uploads/sites/8/2018/07/layout.png" alt="" width="466" height="593" /></a><figcaption id="caption-attachment-456" class="wp-caption-text">Illustrazione dello strumento di collaudo completamente assemblato.</figcaption></figure> <p><span style="font-weight: 400">Lo strumento di collaudo è stato installato sul telescopio Mayall in data 1 aprile 2019 ed ha svolto la sua attività per un periodo di due mesi. Nell’estate del 2019 è stato rimosso per far posto al sistema del piano focale di DESI.</span></p> </div></article></main><aside class="sidebar sidebar-primary widget-area" role="complementary" aria-label="Primary Sidebar" itemscope itemtype="https://schema.org/WPSideBar" id="genesis-sidebar-primary"><h2 class="genesis-sidebar-title screen-reader-text">Primary Sidebar</h2><section id="nav_menu-54" class="widget widget_nav_menu"><div class="widget-wrap"><div class="menu-instrument-italian-container"><ul id="menu-instrument-italian" class="menu"><li id="menu-item-2923" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-2923"><a href="https://www.desi.lbl.gov/it/instrument-italian/" itemprop="url">Descrizione dello strumento</a></li> <li id="menu-item-2921" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-2921"><a href="https://www.desi.lbl.gov/it/telescope-italian/" itemprop="url">Telescopio</a> <ul class="sub-menu"> 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