{"id":593,"date":"2017-09-25T16:14:17","date_gmt":"2017-09-25T15:14:17","guid":{"rendered":"https:\/\/pepsi.aip.de\/?p=593"},"modified":"2017-10-26T21:42:49","modified_gmt":"2017-10-26T20:42:49","slug":"polarimeter-commisioning-coming-in-september","status":"publish","type":"post","link":"https:\/\/pepsi.aip.de\/?p=593","title":{"rendered":"Polarimeters saw first light, LBT gets polarized"},"content":{"rendered":"<div id='gallery-1' class='gallery galleryid-593 gallery-columns-4 gallery-size-thumbnail'><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\/PolarimeterComissioning2.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/PolarimeterComissioning2-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/div><\/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\/PolarimeterComissioning3.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/PolarimeterComissioning3-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/div><\/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\/PolarimeterComissioning1.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/08\/PolarimeterComissioning1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/div><\/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\/10\/PolarimeterComissioning17.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning17-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/div><\/figure>\n\t\t<\/div>\n\n<p>The installation of PEPSI at the LBT was completed on September 6th when both its polarimeters were mounted in the straight foci of the LBT. During the night of September 10, 2017 the telescope was pointed to the magnetic standard star gamma Equ and a series of integrations in circularly and linearly polarized light were obtained. These spectra have a spectral resolution of R=120,000, covered four wavelength regions in the optical (two always simultaneously) and reached a S\/N ratio of up to 600:1 in 6 min integrations. The telescope was just tracking and not guiding yet nor were the wavefront sensors actively collimating the telescopes. The image quality was controlled by eye (by John Hill remotly from Tucson). Because the polarimeters for each of the LBT telescopes are identical and modular in design, circular and linear polarization may be obtained simultaneously. We used the SX side for circular and the DX side for linear polarization. A total of 12 exposures were obtained.<\/p>\n<h6>Image gallery<\/h6>\n<div id='gallery-2' class='gallery galleryid-593 gallery-columns-4 gallery-size-thumbnail'><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\/10\/PolarimeterComissioning4.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning4-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Screenshot of the PEPSI GUI while taking the first polarimetric spectrum.\" aria-describedby=\"gallery-2-602\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-602'>\n\t\t\t\tScreenshot of the PEPSI GUI while taking the first polarimetric spectrum.\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\/10\/PolarimeterComissioning5.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning5-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Polarimeter comissioning.\" aria-describedby=\"gallery-2-603\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-603'>\n\t\t\t\tPolarimeter comissioning.\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\/10\/PolarimeterComissioning6.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning6-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"PI and projects scientist happy!\" aria-describedby=\"gallery-2-604\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-604'>\n\t\t\t\tPI and projects scientist happy!\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\/10\/PolarimeterComissioning7.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning7-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"The PEPSI-POL team.\" aria-describedby=\"gallery-2-605\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-605'>\n\t\t\t\tThe PEPSI-POL team.\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\/10\/PolarimeterComissioning8.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning8-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"View down the hatch. SX is approaching.\" aria-describedby=\"gallery-2-606\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-606'>\n\t\t\t\tView down the hatch. SX is approaching.\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\/10\/PolarimeterComissioning13.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning13-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Mating w\/ SX focus.\" aria-describedby=\"gallery-2-611\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-611'>\n\t\t\t\tMating w\/ SX focus.\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\/10\/PolarimeterComissioning12.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning12-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Mating w\/ SX focus.\" aria-describedby=\"gallery-2-610\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-610'>\n\t\t\t\tMating w\/ SX focus.\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\/10\/PolarimeterComissioning11.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning11-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"SX unit on ist way to the focus, September 2017.\" aria-describedby=\"gallery-2-609\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-609'>\n\t\t\t\tSX unit on ist way to the focus, September 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\/10\/PolarimeterComissioning16.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning16-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"SX on the telescope, 8\/9\/17.\" aria-describedby=\"gallery-2-614\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-614'>\n\t\t\t\tSX on the telescope, 8\/9\/17.\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\/10\/PolarimeterComissioning14.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning14-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Wilbert and James working in the hole on DX AGW\u2026\" aria-describedby=\"gallery-2-612\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-612'>\n\t\t\t\tWilbert and James working in the hole on DX AGW\u2026\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\/10\/PolarimeterComissioning9.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning9-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Cabling of DX unit.\" aria-describedby=\"gallery-2-607\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-607'>\n\t\t\t\tCabling of DX unit.\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\/10\/PolarimeterComissioning10.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning10-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"DX unit w\/ science fibre cable connected.\" aria-describedby=\"gallery-2-608\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-608'>\n\t\t\t\tDX unit w\/ science fibre cable connected.\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\/10\/PolarimeterComissioning15.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/pepsi.aip.de\/wp-content\/uploads\/2017\/10\/PolarimeterComissioning15-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"DX on the telescope, 8\/9\/17.\" aria-describedby=\"gallery-2-613\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-613'>\n\t\t\t\tDX on the telescope, 8\/9\/17.\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>The installation of PEPSI at the LBT was completed on September 6th when both its polarimeters were mounted in the straight foci of the LBT. During the night of September 10, 2017 the telescope was pointed to the magnetic standard star gamma Equ and a series of integrations in circularly and linearly polarized light were &hellip; <a href=\"https:\/\/pepsi.aip.de\/?p=593\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Polarimeters saw first light, LBT gets polarized<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,15],"tags":[],"class_list":["post-593","post","type-post","status-publish","format-standard","hentry","category-announcements","category-first_light"],"_links":{"self":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/593","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=593"}],"version-history":[{"count":17,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/593\/revisions"}],"predecessor-version":[{"id":674,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=\/wp\/v2\/posts\/593\/revisions\/674"}],"wp:attachment":[{"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=593"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=593"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pepsi.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}