{"id":90095,"date":"2022-04-06T18:19:21","date_gmt":"2022-04-06T16:19:21","guid":{"rendered":"https:\/\/www.astb.se\/cassiopeiabloggen\/?p=90095"},"modified":"2022-04-06T20:55:28","modified_gmt":"2022-04-06T18:55:28","slug":"nr-22-2022","status":"publish","type":"post","link":"https:\/\/www.astb.se\/cassiopeiabloggen\/2022\/04\/06\/nr-22-2022\/","title":{"rendered":"Nr 22 2022"},"content":{"rendered":"\n

Supernovajakt i M51<\/h2>\n\n\n\n

Det \u00e4r extra roligt med v\u00e5ra duktiga astrofotografer f\u00f6r deras bilder f\u00e5r mig ofta att jaga senaste nytt om objekten..N\u00e4r Bengt R\u00f6nde <\/strong>s\u00e4nde \u00f6ver studier av M51aka Malstr\u00f6msgalaxen i Jakthundarnas stj\u00e4rnbild, undrade jag direkt: Om vi har tur kan vi med v\u00e5ra teleskop och kameror uppt\u00e4cka supernovor i galaxen.<\/p>\n\n\n\n

Just M51 har haft ett antal SN-sm\u00e4llar genom \u00e5ren. F\u00f6r drygt tio \u00e5r uppt\u00e4cktes en, och \u00e5ret efter ytterligare en. Den skenbara maxmagnituden kan ligga runt 14 – identifierbar f\u00f6r v\u00e5ra framst\u00e5ende astrofotografer. <\/p>\n\n\n\n

\"\"<\/a><\/figure><\/div>\n\n\n\n

Bengt har experimenterat med olika l\u00e5nga exponeringar. Jfr 6-minuters och 78-minuters exponeringen senast (h\u00e4r skulle supernovan 2011 l\u00e4tt ha setts):<\/p>\n\n\n\n

<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

H\u00e4r finns <\/a>en hyggligt uppdaterad n\u00e4tartikel om k\u00e4nda M51-supernovor fr\u00e5n 2018.<\/p>\n\n\n\n

N\u00e4r storsm\u00e4ller det i M31\/Andromedagalaxen n\u00e4sta g\u00e5ng? Det har g\u00e5tt 137 \u00e5r sen senast.<\/p>\n\n\n\n

En \u00e4ldre rapport fr\u00e5n \u00e5r 2000 om klassiska novor i M51, M87 och M101 \u00e5terfinns h\u00e4r.<\/a> Det har s\u00e4kert iakttagits fler sen dess, men min point \u00e4r att d\u00e5 \u00e4r de visuella maxmagnituderna l\u00e4gre, betydligt l\u00e4gre, kanske 20-21-22 magnituden. Och d\u00e4r h\u00e4nger vi amat\u00f6rer \u00e4nnu inte med. M\u00f6jligheterna att se klassiska novor i M31\/Andromedagalaxen \u00e4r betydligt b\u00e4ttre, de brukar landa runt 17 magn.<\/p>\n\n\n\n

St\u00f6d f\u00f6r Ukrainas naturvetare<\/h2>\n\n\n\n

Sajten physicssworld.com rapporterar kontinuerligt<\/a> om st\u00f6det till Ukrainas naturvertare inkl astronomer och fysiker. Notabelt \u00e4r att den av teknikoligarken Yuri Milner <\/strong>skapade fonden bakom Breakthrough-priset deltar fullt ut i st\u00f6darbetet.<\/p>\n\n\n\n

Filantropen Milner \u00e4r ryss-israel (f\u00f6dd i Moskva 1960) och tidigare en supporter av Kreml. Det \u00e4r han inte l\u00e4ngre.<\/p>\n\n\n\n

<\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Supernovajakt i M51 Det \u00e4r extra roligt med v\u00e5ra duktiga astrofotografer f\u00f6r deras bilder f\u00e5r mig ofta att jaga senaste nytt om objekten..N\u00e4r Bengt R\u00f6nde s\u00e4nde \u00f6ver studier av M51aka Malstr\u00f6msgalaxen i Jakthundarnas stj\u00e4rnbild, undrade jag direkt: Om vi har tur kan vi med v\u00e5ra teleskop och kameror uppt\u00e4cka supernovor i galaxen. Just M51 har… L\u00e4s mer »Nr 22 2022<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":[],"rop_publish_now_history":[],"rop_publish_now_status":"pending","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[3],"tags":[],"_links":{"self":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/90095"}],"collection":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/comments?post=90095"}],"version-history":[{"count":16,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/90095\/revisions"}],"predecessor-version":[{"id":90115,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/90095\/revisions\/90115"}],"wp:attachment":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/media?parent=90095"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/categories?post=90095"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/tags?post=90095"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}