{"id":332,"date":"2017-03-01T11:32:54","date_gmt":"2017-03-01T10:32:54","guid":{"rendered":"https:\/\/bmk10k.aip.de\/?page_id=332"},"modified":"2018-03-13T12:17:29","modified_gmt":"2018-03-13T11:17:29","slug":"expected-photometric-precision","status":"publish","type":"page","link":"https:\/\/bmk10k.aip.de\/?page_id=332","title":{"rendered":"Expected photometric precision"},"content":{"rendered":"<figure id=\"attachment_368\" aria-describedby=\"caption-attachment-368\" style=\"width: 962px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-368 size-full\" src=\"https:\/\/bmk10k.aip.de\/wp-content\/uploads\/2017\/03\/BMK-photon-noise-limit.png\" alt=\"\" width=\"962\" height=\"654\" srcset=\"https:\/\/bmk10k.aip.de\/wp-content\/uploads\/2017\/03\/BMK-photon-noise-limit.png 962w, https:\/\/bmk10k.aip.de\/wp-content\/uploads\/2017\/03\/BMK-photon-noise-limit-300x204.png 300w, https:\/\/bmk10k.aip.de\/wp-content\/uploads\/2017\/03\/BMK-photon-noise-limit-768x522.png 768w\" sizes=\"auto, (max-width: 962px) 100vw, 962px\" \/><figcaption id=\"caption-attachment-368\" class=\"wp-caption-text\">Photometric error expected for a 120s exposure<\/figcaption><\/figure>\n<p>The\u00a0figure shows an empirical photometric scatter diagram from data obtained with the Graz BMK and a different CCD, without the C-filter, and at the original location near Graz, Austria (c\/o Weingrill 2007, Master thesis, Univ. Graz). It shows that the system can deliver milli-mag photometry for stars brighter than 13 th mag in 120s integrations. 1%\u22125% photometry is possible down to a magnitude of 16 th mag. The latter limit could be extended by another magnitude with the new set up and longer exposure times. The system is never photon-noise limited though. Expected precision ranges are \u22481mmag for V&lt;10 th mag, 2-3mmag for 10-11mag, \u22485mmag for 11-12.5mag, and \u224810mmag for 12.5-13.5mag. Faint limit is \u224816.5mag at \u224850mmag.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The\u00a0figure shows an empirical photometric scatter diagram from data obtained with the Graz BMK and a different CCD, without the C-filter, and at the original location near Graz, Austria (c\/o Weingrill 2007, Master thesis, Univ. Graz). It shows that the system can deliver milli-mag photometry for stars brighter than 13 th mag in 120s integrations. &hellip; <a href=\"https:\/\/bmk10k.aip.de\/?page_id=332\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Expected photometric precision<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"parent":350,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-332","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/bmk10k.aip.de\/index.php?rest_route=\/wp\/v2\/pages\/332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bmk10k.aip.de\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/bmk10k.aip.de\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/bmk10k.aip.de\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/bmk10k.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=332"}],"version-history":[{"count":4,"href":"https:\/\/bmk10k.aip.de\/index.php?rest_route=\/wp\/v2\/pages\/332\/revisions"}],"predecessor-version":[{"id":433,"href":"https:\/\/bmk10k.aip.de\/index.php?rest_route=\/wp\/v2\/pages\/332\/revisions\/433"}],"up":[{"embeddable":true,"href":"https:\/\/bmk10k.aip.de\/index.php?rest_route=\/wp\/v2\/pages\/350"}],"wp:attachment":[{"href":"https:\/\/bmk10k.aip.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}