{"id":568,"date":"2017-08-28T12:15:57","date_gmt":"2017-08-28T11:15:57","guid":{"rendered":"https:\/\/pepsi.aip.de\/?p=568"},"modified":"2017-08-28T12:15:57","modified_gmt":"2017-08-28T11:15:57","slug":"partial-solar-eclipse-observed-by-sdi","status":"publish","type":"post","link":"https:\/\/pepsi.aip.de\/?p=568","title":{"rendered":"Partial solar eclipse observed by SDI"},"content":{"rendered":"<p>August 21, 2017. The partial solar eclipse was observed at Mt.Graham in Arizona remotely from AIP with the Solar Disk Integrated Telescope (SDI) which guides on the Sun and feeds the light into the PEPSI high-resolution spectrograph in the pier of the LBT telescope. The partial eclipse began on 09:16 MST and ended at\u00a012:03 MST.<\/p>\n<div style=\"width: 474px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-568-1\" width=\"474\" height=\"474\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_converted.mp4?_=1\" \/><a href=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_converted.mp4\">https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_converted.mp4<\/a><\/video><\/div>\n<div id='gallery-1' class='gallery galleryid-568 gallery-columns-2 gallery-size-medium'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_ts.png'><img loading=\"lazy\" decoding=\"async\" width=\"252\" height=\"300\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_ts-252x300.png\" class=\"attachment-medium size-medium\" alt=\"Partial Solar eclipse 2017 viewed by SDI.\" aria-describedby=\"gallery-1-573\" srcset=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_ts-252x300.png 252w, https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_ts-768x916.png 768w, https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_ts-859x1024.png 859w, https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_ts.png 1290w\" sizes=\"auto, (max-width: 252px) 100vw, 252px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-573'>\n\t\t\t\tPartial Solar eclipse 2017 viewed by SDI.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_sodium.png'><img loading=\"lazy\" decoding=\"async\" width=\"133\" height=\"300\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_sodium-133x300.png\" class=\"attachment-medium size-medium\" alt=\"Time series spectra of the Sodium D1 line during the partial Solar eclipse 2017.\" aria-describedby=\"gallery-1-572\" srcset=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_sodium-133x300.png 133w, https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_sodium-768x1728.png 768w, https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_sodium-455x1024.png 455w, https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_sodium.png 845w\" sizes=\"auto, (max-width: 133px) 100vw, 133px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-572'>\n\t\t\t\tTime series spectra of the Sodium D1 line during the partial Solar eclipse 2017.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_bisector.png'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"267\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_bisector-300x267.png\" class=\"attachment-medium size-medium\" alt=\"Time series of the bisector of the Sodium D1 line during the partial Solar eclipse 2017.\" aria-describedby=\"gallery-1-571\" srcset=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_bisector-300x267.png 300w, https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/sdi_solar_eclipse2017_bisector.png 622w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-571'>\n\t\t\t\tTime series of the bisector of the Sodium D1 line during the partial Solar eclipse 2017.\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n<p>One hundred spectra were obtained during the course of the eclipse in two wavelength regions 422-477 and 536-628 nm with the resolving power 270 000 (1100 m\/s in radial velocity per resolution element). The spectra obtained are highly dynamic as the area of the line formation changes, hence, the shape of the lines is slightly alternating. We perform analysis of the Sodium D1 line 589.59 nm which is formed in the lower chromosphere of the Sun above 500 km of its photosphere. Its bisector (i.e. the central wavelength at different depths of the line profile) shows large changes in the line core which is formed in the higher chromospheric layers.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>August 21, 2017. The partial solar eclipse was observed at Mt.Graham in Arizona remotely from AIP with the Solar Disk Integrated Telescope (SDI) which guides on the Sun and feeds the light into the PEPSI high-resolution spectrograph in the pier of the LBT telescope. The partial eclipse began on 09:16 MST and ended at\u00a012:03 MST. &hellip; <a href=\"https:\/\/pepsi.aip.de\/?p=568\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Partial solar eclipse observed by SDI<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,16],"tags":[],"class_list":["post-568","post","type-post","status-publish","format-standard","hentry","category-announcements","category-sdt"],"_links":{"self":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/568","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=568"}],"version-history":[{"count":8,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/568\/revisions"}],"predecessor-version":[{"id":585,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/568\/revisions\/585"}],"wp:attachment":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=568"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=568"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=568"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}