{"id":1815,"date":"2021-12-20T09:12:09","date_gmt":"2021-12-20T08:12:09","guid":{"rendered":"https:\/\/stel.asu.cas.cz\/cs\/?page_id=1815"},"modified":"2024-02-09T14:45:22","modified_gmt":"2024-02-09T13:45:22","slug":"spektrograf-oes","status":"publish","type":"page","link":"https:\/\/stel.asu.cas.cz\/cs\/perkuv-dalekohled\/pristroje\/spektrograf-oes\/","title":{"rendered":"Echelle Spektrograf OES"},"content":{"rendered":"\n<p>Ond\u0159ejov Echelle Spectrograph (OES) je vl\u00e1knov\u011b nap\u00e1jen\u00fd e\u0161eletov\u00fd spektrograf. P\u0159\u00edstroj je um\u00edst\u011bn v teplotn\u011b stabilizovan\u00e9 m\u00edstnosti &#8218;coud\u00e9&#8216; (b\u00fdval\u00e9 coud\u00e9 ohnisko dalekohledu) a sign\u00e1l je do n\u011bj p\u0159iv\u00e1d\u011bn optick\u00fdm vl\u00e1knem z prim\u00e1rn\u00edho ohniska Perkova dalekohledu. Sv\u011btlo je rozlo\u017eeno pomoc\u00ed e\u0161eletov\u00e9 m\u0159\u00ed\u017eky (v\u00fdrobce Richardson Grating Laboratories). Zrcadlo d\u00e1le odr\u00e1\u017e\u00ed paprsky do rovnostrann\u00e9ho hranolu (v\u00fdrobce TOPTEC Turnov; Schott LF5) jeho\u017e strany sv\u00edraj\u00ed \u00fahel 55\u00b0. Hranol odd\u011bluje jednotliv\u00e9 \u0159\u00e1dy a sv\u011btlo dopad\u00e1 do ohniska &#8211; na CCD detektor (Versarray 2048B, Roper Scientific, <a href=\"http:\/\/stel.asu.cas.cz\/wptest\/wp-content\/uploads\/2021\/07\/OES-ccd.pdf\" target=\"_blank\" rel=\"noopener\">podrobnosti<\/a>), kter\u00fd je chlazen\u00fd tekut\u00fdm dus\u00edkem na pracovn\u00ed teplotu -110\u00b0C.<\/p>\n\n\n\n<p>Do spektrografu je p\u0159ivedeno z\u00e1\u0159en\u00ed tak\u00e9 z kalibra\u010dn\u00ed ThAr lampy. V m\u00edst\u011b vstupu sv\u011btla z dalekohledu do spektrografu je um\u00edst\u011bna jodov\u00e1 bu\u0148ka, kter\u00e1 je nez\u00e1visl\u00fdm kalibra\u010dn\u00edm zdrojem pro spektr\u00e1ln\u00ed pozorov\u00e1n\u00ed.<\/p>\n\n\n\n<p>Detailn\u011bj\u0161\u00ed technick\u00fd popis s mechanick\u00fdm uspo\u0159\u00e1d\u00e1n\u00edm a v\u0161emi optick\u00fdmi prvky je mo\u017en\u00e9 naj\u00edt ve zpr\u00e1v\u011b z instalace za\u0159\u00edzen\u00ed OES (<a href=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/06\/telescope_specification.jpg\" target=\"_blank\" rel=\"noreferrer noopener\">Koubsk\u00fd at al., Ond\u0159ejov Echelle Spectrograph &#8211; OES, Publ. Astron. Inst. ASCR, 92:37\u201343, 2004<\/a>). Dal\u0161\u00ed podrobnosti lze nal\u00e9zt tak\u00e9 v pr\u00e1ci &#8218;<span dir=\"ltr\" role=\"presentation\">Ond\u0159<\/span><span dir=\"ltr\" role=\"presentation\">ejov echelle spectrograph, ground based <\/span><span dir=\"ltr\" role=\"presentation\">support facility for exoplanet missions&#8216; autor\u016f <\/span>Kab\u00e1th P. a kol. (2020,&nbsp;<a href=\"http:\/\/stel.asu.cas.cz\/en\/wp-content\/uploads\/2021\/12\/Kabath-OES.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">PASP, 132, 5002<\/a>).<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:67%\">\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"652\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/oes.png\" alt=\"\" class=\"wp-image-1030\" style=\"width:501px;height:327px\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/oes.png 1000w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/oes-300x196.png 300w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/oes-768x501.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"610\" height=\"1024\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/OES-610x1024.jpg\" alt=\"\" class=\"wp-image-1035\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/OES-610x1024.jpg 610w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/OES-179x300.jpg 179w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/OES-768x1288.jpg 768w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/OES-916x1536.jpg 916w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/OES.jpg 1216w\" sizes=\"auto, (max-width: 610px) 100vw, 610px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p style=\"font-size:14px\"><strong>Vlevo<\/strong>: N\u00e1kres spektrografu OES zachycuje optick\u00e9 uspo\u0159\u00e1d\u00e1n\u00ed a chod paprsk\u016f od \u0161t\u011brbiny k detektoru. <strong>A<\/strong>: \u0161t\u011brbina, <strong>B<\/strong>: kolim\u00e1tor, <strong>C<\/strong>: e\u0161eletov\u00e1 m\u0159\u00ed\u017eka, <strong>D<\/strong>: 1. parabolick\u00e9 zrcadlo, <strong>E<\/strong>: mal\u00e9 rovinn\u00e9 zrc\u00e1tko, <strong>F<\/strong>: 2. parabolick\u00e9 zrcadlo (optick\u00e9 prvky D, E a F jsou sou\u010d\u00e1st\u00ed takzvan\u00e9 b\u00edl\u00e9 pupily, zu\u017euj\u00ed sv\u011bteln\u00fd svazek), <strong>G<\/strong>: hranol, <strong>H<\/strong>: objektiv a dewarova n\u00e1doba. <strong>Vpravo<\/strong>: Mechanick\u00e9 \u010d\u00e1sti dr\u017e\u00edc\u00ed optick\u00e9 prvky spektrografu OES. <strong>Vpravo dole<\/strong>: detektor s Dewarovou n\u00e1dobou. Kredit: Miroslav \u0160lechta<\/p>\n\n\n\n<h4 class=\"wp-block-heading has-vivid-cyan-blue-color has-text-color\" id=\"block-b48c0dc8-8ad7-4e4e-8e84-c57a8df851b5\"><strong>Echelle m\u0159\u00ed\u017eka<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>V\u00fdrobce: Richardson Grating Laboratories<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table is-style-regular\">\n<table class=\"has-fixed-layout\" style=\"font-size: 80%;\">\n<tbody>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">Rozm\u011bry<\/span><\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">Echelle<\/span><\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">Blaze angle<\/span><\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">Materi\u00e1l<\/span><\/strong><\/td>\n<\/tr>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>157 x 412 mm<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>54.5 g\/mm<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>69\u00b0<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>Zerodur<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h4 class=\"wp-block-heading has-vivid-cyan-blue-color has-text-color\" id=\"block-287cf1fa-bb5a-42b2-a834-e9dfa9ccaa6b\">Hranol<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>v\u00fdrobce: Walter, MFF UK Praha<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table is-style-regular\">\n<table class=\"has-fixed-layout\" style=\"font-size: 80%;\">\n<tbody>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">Rozm\u011bry<\/span><\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">V\u00fd\u0161ka<\/span><\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">Difrak\u010dn\u00ed \u00fahel<\/span><\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">Materi\u00e1l<\/span><\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">Hustota<\/span><\/strong><\/td>\n<\/tr>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>144 x 118 mm<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>140 mm<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>54.5\u00b0<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>Schott LF5<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong>3.25 g\/mm<sup>3<\/sup><\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h4 class=\"wp-block-heading has-vivid-cyan-blue-color has-text-color\" id=\"block-f3ab954d-fb01-46f7-a47a-fdab380e9187\">CCD kamera<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>v\u00fdrobce: Versarray 2048B<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table is-style-regular\">\n<table class=\"has-fixed-layout\" style=\"font-size: 80%;\">\n<tbody>\n<tr>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">\u010cip<\/span><\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">Rozli\u0161en\u00ed<\/span><\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">Rozm\u011br pixelu<\/span><\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><span class=\"has-inline-color has-black-color\">Technick\u00e9<\/span><\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>EEV 42-40-1-368<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>2048 x 2048<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>13.5 x 13.5 <\/strong>\u03bc<strong>m<\/strong><\/td>\n<td class=\"has-text-align-center\" data-align=\"center\"><strong><a href=\"http:\/\/stel.asu.cas.cz\/wptest\/wp-content\/uploads\/2021\/07\/OES-ccd.pdf\">Podrobnosti<\/a><\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-2 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p><\/p>\n<\/div>\n<\/div>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"rozsah-vlnovych-delek-a-vykon\">Rozsah vlnov\u00fdch d\u00e9lek a v\u00fdkon<\/h5>\n\n\n\n<p>Spektrograf OES pokr\u00fdv\u00e1 vlnov\u00e9 d\u00e9lky v rozsahu od UV oblasti (3753 \u00c5) a\u017e do bl\u00edzk\u00e9ho IR z\u00e1\u0159en\u00ed (9195 \u00c5). Dosahuje rozli\u0161en\u00ed R=51600 na vlnov\u00e9 d\u00e9lce 5000 \u00c5 (R\u223c40000 v oblasti H\u03b1) a spektr\u00e1ln\u00edho vzorkov\u00e1n\u00ed 2,4 \u00c5\/mm. Spektr\u00e1ln\u00ed rozsah pokr\u00fdv\u00e1 56 pou\u017eiteln\u00fdch \u0159\u00e1d\u016f. Po\u010det spektr\u00e1ln\u00edch \u0159\u00e1d\u016f se pohybuje mezi 92 po 36. Jednotliv\u00e9 spektr\u00e1ln\u00ed \u0159\u00e1dy pokr\u00fdvaj\u00ed rozsah \u223c70 \u00c5 (v UV oblasti) a \u223c145 \u00c5 (v IR). V modr\u00e9 \u010d\u00e1sti spektra se \u0159\u00e1dy p\u0159ekr\u00fdvaj\u00ed a je tedy mo\u017en\u00e9 je slo\u017eit. Interval p\u0159ekryt\u00ed je kolem 20 \u00c5 (UV). P\u0159ekryt\u00ed se v\u0161ak s rostouc\u00ed vlnovou d\u00e9lkou zkracuje a posledn\u00ed oblast p\u0159ekryt\u00ed je v \u0159\u00e1dech pokr\u00fdvaj\u00edc\u00edch vlnov\u00e9 d\u00e9lky 5782-5879 a 5879-5977 (m\u00e9n\u011b ne\u017e 1 \u00c5). Mezi \u0159\u00e1dy pokr\u00fdvaj\u00edc\u00edmi oblasti 5879-5977 a 5978-6079 je ji\u017e mezera o \u0161\u00ed\u0159ce \u223c1 \u00c5, kter\u00e1 se d\u00e1le roz\u0161i\u0159uje &#8211; v oblasti Ha je mezera mezi \u0159\u00e1dy ji\u017e \u223c13 \u00c5 a dokonce \u223c63 \u00c5 kolem 8800 \u00c5.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"http:\/\/stel.asu.cas.cz\/~slechta\/2mEN\/echelle\/\" target=\"_blank\" rel=\"noreferrer noopener\" data-rich-text-format-boundary=\"true\">Technick\u00e1 specifikace a atlas \u010dar ThAr kalibra\u010dn\u00ed lampy<\/a><\/li>\n<\/ul>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"block-0ffc97b1-26ee-4842-8e4a-7bba327fedd2\">Uk\u00e1zkov\u00e9 sn\u00edmky<\/h5>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-3 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-zero.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-zero-1024x1024.jpg\" alt=\"\" class=\"wp-image-1830\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-zero-1024x1024.jpg 1024w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-zero-300x300.jpg 300w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-zero-150x150.jpg 150w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-zero-768x768.jpg 768w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-zero-1536x1536.jpg 1536w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-zero-18x18.jpg 18w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-zero-24x24.jpg 24w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-zero-36x36.jpg 36w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-zero.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">zero<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\" id=\"block-2ff4eff2-f97d-4cec-883d-3deeff1a9c1d\"><a href=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-flat.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-flat-1024x1024.jpg\" alt=\"\" class=\"wp-image-1831\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-flat-1024x1024.jpg 1024w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-flat-300x300.jpg 300w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-flat-150x150.jpg 150w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-flat-768x768.jpg 768w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-flat-1536x1536.jpg 1536w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-flat-18x18.jpg 18w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-flat-24x24.jpg 24w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-flat-36x36.jpg 36w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-flat.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Flat<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\" id=\"block-6ef60239-e868-4889-95a2-69aaefcab469\"><a href=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-ThAr.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-ThAr-1024x1024.jpg\" alt=\"\" class=\"wp-image-1828\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-ThAr-1024x1024.jpg 1024w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-ThAr-300x300.jpg 300w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-ThAr-150x150.jpg 150w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-ThAr-768x768.jpg 768w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-ThAr-1536x1536.jpg 1536w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-ThAr-18x18.jpg 18w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-ThAr-24x24.jpg 24w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-ThAr-36x36.jpg 36w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-ThAr.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Th-Ar calibration lamp<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\" id=\"block-9cc0b461-9de2-4a40-b194-5cd391849b35\"><a href=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-aplha-lyr.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-aplha-lyr-1024x1024.jpg\" alt=\"\" class=\"wp-image-1829\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-aplha-lyr-1024x1024.jpg 1024w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-aplha-lyr-300x300.jpg 300w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-aplha-lyr-150x150.jpg 150w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-aplha-lyr-768x768.jpg 768w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-aplha-lyr-1536x1536.jpg 1536w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-aplha-lyr-18x18.jpg 18w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-aplha-lyr-24x24.jpg 24w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-aplha-lyr-36x36.jpg 36w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/12\/OES-aplha-lyr.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Alpha Lyr (Vega), exp. 30s<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"block-ea55b7ab-844c-443a-b985-bfd0e31a82f3\">Pom\u011br SNR a expozi\u010dn\u00ed \u010das<\/h5>\n\n\n\n<p>Vhodnou dobu expozice lze zhruba odhadnout s pou\u017eit\u00edm n\u00e1sleduj\u00edc\u00edho grafu. Jak je patrn\u00e9, pom\u011br sign\u00e1l\/\u0161um (SNR) 20 za jednu hodinu expozice je mo\u017en\u00e9 z\u00edskat pro hv\u011bzdu 10 mag. Graf zachycuje situaci p\u0159ed p\u0159estavbou teleskopu (bez vyu\u017eit\u00ed optick\u00fdch vl\u00e1ken). V sou\u010dasnosti je v\u00fdkon za\u0159\u00edzen\u00ed asi o 60% lep\u0161\u00ed. Pom\u011br SNR v\u0161ak nez\u00e1le\u017e\u00ed pouze na zenitov\u00e9 vzd\u00e1lenosti hv\u011bzdy, ale p\u0159edev\u0161\u00edm na pozorovac\u00edch podm\u00ednk\u00e1ch. Limitn\u00ed p\u0159esnost pro m\u011b\u0159en\u00ed radi\u00e1ln\u00edch rychlost\u00ed je v \u0159\u00e1du stovek m\/s pro slab\u00e9 hv\u011bzdy. S pou\u017eit\u00edm iodov\u00e9 bu\u0148ky je v\u0161ak mo\u017en\u00e9 dos\u00e1hnout p\u0159esnosti n\u011bkolik des\u00edtek m\/s.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/SNR-OES.png\" alt=\"\" class=\"wp-image-1054\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/SNR-OES.png 640w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2021\/08\/SNR-OES-300x225.png 300w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption class=\"wp-element-caption\">Expozi\u010dn\u00ed \u010das pot\u0159ebn\u00fd k z\u00edsk\u00e1n\u00ed po\u017eadovan\u00e9ho pom\u011bru SNR se spektrografem OES. Kredit: Miroslav \u0160lechta<br><\/figcaption><\/figure><\/div>\n\n\n<h4 class=\"wp-block-heading has-vivid-cyan-blue-color has-text-color\" id=\"jodova-banka\">J\u00f3dov\u00e1 ba\u0148ka<\/h4>\n\n\n\n<p>Ond\u0159ejov Echelle Spectrograph (OES) na Perkov\u011b 2-m dalekohledu je vybaven jodovou ba\u0148kou, kter\u00e1 slou\u017e\u00ed ke kalibraci pozorovan\u00fdch spekter. D\u00edky jodov\u00e9 ba\u0148ce lze m\u011b\u0159it posuny \u010dar ve spektrech na detektoru s p\u0159esnost\u00ed 0.00005 mm, a je mo\u017en\u00e9 detekovat nap\u0159\u00edklad men\u0161\u00ed exoplanety ob\u00edhaj\u00edc\u00ed vzd\u00e1len\u00e9 hv\u011bzdy ne\u017e p\u0159i pou\u017eit\u00ed b\u011b\u017en\u00e9 kalibra\u010dn\u00ed metody za pomoc\u00ed \u010dar z thorium-argonov\u00e9 lampy.<\/p>\n\n\n\n<p>J\u00f3dovou ba\u0148ku vyrobil a pozd\u011bji stel\u00e1rn\u00edmu odd\u011blen\u00ed Astronomick\u00e9ho \u00fastavu v Ond\u0159ejov\u011b pro OES dlouhodob\u011b zap\u016fj\u010dil prof. Artie Hatzes z observato\u0159e v Tautenburgu v N\u011bmecku. Ten se zab\u00fdv\u00e1 v\u00fdzkumem extrasol\u00e1rn\u00edch planet, a k jejich nalezen\u00ed jedna metoda vyu\u017e\u00edv\u00e1 p\u0159esn\u00e1 m\u011b\u0159en\u00ed posunu \u010dar ve spektrech. A pr\u00e1v\u011b jodov\u00e1 ba\u0148ka slou\u017e\u00ed tomuto \u00fa\u010delu. Je to ba\u0148ka napln\u011bn\u00e1 jodem, kter\u00e1 je um\u00edst\u011bna p\u0159ed \u0161t\u011brbinou spektrografu ve sv\u011btle p\u0159ich\u00e1zej\u00edc\u00edm z dalekohledu od hv\u011bzdy. P\u0159i pozorov\u00e1n\u00ed se ba\u0148ka s jodem zah\u0159eje na teplotu 50\u02daC, co\u017e umo\u017en\u00ed vznik jodov\u00fdch par. T\u00edm, \u017ee sv\u011btlo hv\u011bzdy projde p\u0159es jodovou ba\u0148ku, objev\u00ed se v pozorovan\u00fdch hv\u011bzdn\u00fdch spektrech zhruba mezi 500-610 nm absorp\u010dn\u00ed jodov\u00e9 \u010d\u00e1ry. <\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-4 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/P1010016-jodova-banka.jpg\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/P1010016-jodova-banka-1024x768.jpg\" alt=\"\" class=\"wp-image-2988\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/P1010016-jodova-banka-1024x768.jpg 1024w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/P1010016-jodova-banka-300x225.jpg 300w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/P1010016-jodova-banka-768x576.jpg 768w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/P1010016-jodova-banka-800x600.jpg 800w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/P1010016-jodova-banka-18x14.jpg 18w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/P1010016-jodova-banka-24x18.jpg 24w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/P1010016-jodova-banka-36x27.jpg 36w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/P1010016-jodova-banka.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">I\u00f3dov\u00e1 ba\u0148ka p\u0159ed instalac\u00ed<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131140952.jpg\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"766\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131140952-1024x766.jpg\" alt=\"\" class=\"wp-image-3033\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131140952-1024x766.jpg 1024w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131140952-300x224.jpg 300w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131140952-768x575.jpg 768w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131140952-1536x1149.jpg 1536w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131140952-18x13.jpg 18w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131140952-24x18.jpg 24w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131140952-36x27.jpg 36w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131140952.jpg 1604w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">I\u00f3dov\u00e1 ba\u0148ka &#8211; detail<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6223.jpg\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6223-1024x768.jpg\" alt=\"\" class=\"wp-image-3035\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6223-1024x768.jpg 1024w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6223-300x225.jpg 300w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6223-768x576.jpg 768w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6223-1536x1152.jpg 1536w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6223-800x600.jpg 800w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6223-18x14.jpg 18w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6223-24x18.jpg 24w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6223-36x27.jpg 36w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6223.jpg 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">I\u00f3dov\u00e1 ba\u0148ka v optick\u00e9 cest\u011b<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"766\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131123388-1024x766.jpg\" alt=\"\" class=\"wp-image-3032\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131123388-1024x766.jpg 1024w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131123388-300x224.jpg 300w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131123388-768x575.jpg 768w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131123388-1536x1149.jpg 1536w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131123388-18x13.jpg 18w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131123388-24x18.jpg 24w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131123388-36x27.jpg 36w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131123388.jpg 1604w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">I\u00f3dov\u00e1 ba\u0148ka &#8211; detail<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6225.jpg\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6225-1024x768.jpg\" alt=\"\" class=\"wp-image-3036\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6225-1024x768.jpg 1024w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6225-300x225.jpg 300w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6225-768x576.jpg 768w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6225-1536x1152.jpg 1536w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6225-800x600.jpg 800w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6225-18x14.jpg 18w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6225-24x18.jpg 24w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6225-36x27.jpg 36w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell-IMG_6225.jpg 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">I\u00f3dov\u00e1 ba\u0148ka v optick\u00e9 cest\u011b<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"766\" src=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131403257-1024x766.jpg\" alt=\"\" class=\"wp-image-3034\" srcset=\"https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131403257-1024x766.jpg 1024w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131403257-300x224.jpg 300w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131403257-768x575.jpg 768w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131403257-1536x1149.jpg 1536w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131403257-18x13.jpg 18w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131403257-24x18.jpg 24w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131403257-36x27.jpg 36w, https:\/\/stel.asu.cas.cz\/cs\/wp-content\/uploads\/2024\/02\/iodinecell_20240209_131403257.jpg 1604w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">I\u00f3dov\u00e1 ba\u0148ka &#8211; detail<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p>Pozorovan\u00fd posun hv\u011bzdn\u00fdch \u010dar ve spektrech je v\u00fdsledkem Dopplerova posunu od hv\u011bzdy a tak\u00e9 n\u00e1hodn\u00fdch posun\u016f zp\u016fsoben\u00fdch vlivy spektrografu. Tyto n\u00e1hodn\u00e9 posuny se objev\u00ed tak\u00e9 v jodov\u00fdch \u010dar\u00e1ch, a proto modelov\u00e1n\u00edm jodov\u00fdch \u010dar m\u016f\u017eeme tyto posuny nepoch\u00e1zej\u00edc\u00ed od hv\u011bzdy odstranit. Jedn\u00e1 se nap\u0159\u00edklad o zm\u011bnu fotocentra na \u0161t\u011brbin\u011b, mechanick\u00e9 posuvy \u010di ot\u0159esy spektrografu nebo zm\u011bny teploty. Jejich odstran\u011bn\u00edm je pak mo\u017en\u00e9 z\u00edskat p\u0159esn\u011bj\u0161\u00ed a stabiln\u011bj\u0161\u00ed m\u011b\u0159en\u00ed posun\u016f spektr\u00e1ln\u00edch \u010dar v pr\u016fb\u011bhu mnoha let, co\u017e je v\u011bt\u0161inou nutn\u00fd p\u0159edpoklad pro objeven\u00ed exoplanet s dlouh\u00fdmi ob\u011b\u017en\u00fdmi periodami. <\/p>\n\n\n\n<p>V sou\u010dasn\u00e9 dob\u011b jodovou ba\u0148ku vyu\u017e\u00edv\u00e1 k v\u011bdeck\u00fdm pozorov\u00e1n\u00edm skupina exoplanet na stel\u00e1rn\u00edm odd\u011blen\u00ed v Ond\u0159ejov\u011b. S jej\u00ed pomoc\u00ed nap\u0159\u00edklad hledaj\u00ed a potvrzuj\u00ed exoplanety u hv\u011bzd typu \u010derven\u00e9ho obra. S prof. Hatzesem a jeho kolegy spolupracuj\u00ed na optimalizaci vyu\u017eit\u00ed metody jodov\u00e9 ba\u0148ky pro OES.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ond\u0159ejov Echelle Spectrograph (OES) je vl\u00e1knov\u011b nap\u00e1jen\u00fd e\u0161eletov\u00fd spektrograf. P\u0159\u00edstroj je um\u00edst\u011bn v teplotn\u011b stabilizovan\u00e9 m\u00edstnosti &#8218;coud\u00e9&#8216; (b\u00fdval\u00e9 coud\u00e9 ohnisko dalekohledu) a sign\u00e1l je do<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":490,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1815","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/pages\/1815","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/comments?post=1815"}],"version-history":[{"count":40,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/pages\/1815\/revisions"}],"predecessor-version":[{"id":3039,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/pages\/1815\/revisions\/3039"}],"up":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/pages\/490"}],"wp:attachment":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media?parent=1815"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}