{"id":74,"date":"2017-02-20T12:55:04","date_gmt":"2017-02-20T10:55:04","guid":{"rendered":"http:\/\/phsites.technion.ac.il\/agn-2017\/?p=74"},"modified":"2017-06-11T13:29:21","modified_gmt":"2017-06-11T11:29:21","slug":"j-kaastra-agn-obscurers","status":"publish","type":"post","link":"https:\/\/phsites.technion.ac.il\/agn-2017\/j-kaastra-agn-obscurers\/","title":{"rendered":"J. Kaastra &#8211; AGN Obscurers"},"content":{"rendered":"<p><a class=\"uk-button \" title=\"J. Kaastra - AGN Obscurers\" href=\"http:\/\/phsites.technion.ac.il\/talks\/agn2017\/Kaastra-J.pdf\">See Presentation<\/a><\/p>\n<p>In this contribution I give an overview on detections of X-ray obscuration in AGN. \u00a0First I present the discovery of obscuration in NGC 5548. In particular the simultaneous presence of lowly ionized, high column density X-ray absorption together with the presence of broad, deep absorption troughs in the UV allowed us to obtain a consistent picture of what is happening during this process. I will indicate some of the challenges in the spectral modeling of these data. Obscuration has also been found in a couple of other sources, and I will briefly compare the similarities and differences between the obscuration in these sources. I finish with some open questions. like:<\/p>\n<ul>\n<li>what is the difference between obscuration and an eclipse?<\/li>\n<li>What are the timescales for obscuration: weeks, years, centuries?<\/li>\n<li>where is the obscuring stream originally born and how?<\/li>\n<li>is there a connection between certain accretion disk behavior and the obscuration?<\/li>\n<li>What fraction of the AGN continuum is covered by the obscuration?<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>See Presentation In this contribution I give an overview on detections of X-ray obscuration in AGN. \u00a0First I present the discovery of obscuration in NGC 5548. In particular the simultaneous presence of lowly ionized, high column density X-ray absorption together with the presence of broad, deep absorption troughs in the UV allowed us to obtain &hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[3],"tags":[],"class_list":{"0":"post-74","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-talks","7":"entry"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>J. Kaastra - AGN Obscurers - AGN Driven Winds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/phsites.technion.ac.il\/agn-2017\/j-kaastra-agn-obscurers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"J. Kaastra - AGN Obscurers - AGN Driven Winds\" \/>\n<meta property=\"og:description\" content=\"See Presentation In this contribution I give an overview on detections of X-ray obscuration in AGN. \u00a0First I present the discovery of obscuration in NGC 5548. In particular the simultaneous presence of lowly ionized, high column density X-ray absorption together with the presence of broad, deep absorption troughs in the UV allowed us to obtain &hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/phsites.technion.ac.il\/agn-2017\/j-kaastra-agn-obscurers\/\" \/>\n<meta property=\"og:site_name\" content=\"AGN Driven Winds\" \/>\n<meta property=\"article:published_time\" content=\"2017-02-20T10:55:04+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2017-06-11T11:29:21+00:00\" \/>\n<meta name=\"author\" content=\"Adi\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Adi\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/phsites.technion.ac.il\\\/agn-2017\\\/j-kaastra-agn-obscurers\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/phsites.technion.ac.il\\\/agn-2017\\\/j-kaastra-agn-obscurers\\\/\"},\"author\":{\"name\":\"Adi\",\"@id\":\"https:\\\/\\\/phsites.technion.ac.il\\\/agn-2017\\\/#\\\/schema\\\/person\\\/65231d9f0ecb94f8411926c66a3791ff\"},\"headline\":\"J. 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