{"id":98696,"date":"2026-02-13T11:43:39","date_gmt":"2026-02-13T10:43:39","guid":{"rendered":"https:\/\/www.astb.se\/cassiopeiabloggen\/?p=98696"},"modified":"2026-02-13T11:43:41","modified_gmt":"2026-02-13T10:43:41","slug":"nr-6-2026-2","status":"publish","type":"post","link":"https:\/\/www.astb.se\/cassiopeiabloggen\/2026\/02\/13\/nr-6-2026-2\/","title":{"rendered":"Nr 6 2026"},"content":{"rendered":"\n

M31 i nytt ljus<\/h2>\n\n\n\n

F\u00f6r en g\u00e5ngs skull st\u00e4mmer den banala rubriken, detta \u00e4r verkligen M31, Andromedagalaxen med celesta omnejder, i nytt ljus. Grattis till v\u00e5r ASTB:are Thomas Hansson<\/strong> och hans kollega Axel Lind<\/strong>e som tillsammans presterat denna otroliga upptagning p\u00e5 sammanlagt fototid p\u00e5 190 timmar.<\/p>\n\n\n\n

Slutresultatet har utsetts till M\u00e5nadens bild p\u00e5 SAAF-sidan Nattmolnet.<\/a><\/p>\n\n\n\n

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

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

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

H\u00e4r h\u00e5rddata om bildens upphov. Ordet till Axel Linde:<\/p>\n\n\n\n

“Objekt: M31 Andromeda. Datum (UT): 2026-01-31. Tid (UT): 15:00. Exponeringstid: 190 timmar. Kalibrering: dark, flat. Bildbehandling: Pixinsight, Photoshop. Kameratemperatur: -10. Autoguidning: Nej. <\/p>\n\n\n\n

Beskrivning: Jag och Thomas Hansson vill presentera v\u00e5rt lilla projekt av M31 \u2013 Andromedagalaxen \u2013 som totalt har tagit oss cirka 190h av exponeringar att sammanst\u00e4lla. Bilden \u00e4r skapad med v\u00e5ra tv\u00e5 sm\u00e5 teleskop RedCat 51 V1 (250 mm) och tv\u00e5 olika kameraupps\u00e4ttningar. Thomas anv\u00e4nder en ASI2600MC Pro (OSC) tillsammans med dualbandfilter Ha\/OIII samt L-Pro-filter. Jag anv\u00e4nder en ASI294MM Pro (mono) med Ha, OIII och LRGB-filter. <\/p>\n\n\n\n

Projektet startade f\u00f6r ungef\u00e4r ett \u00e5r sedan och data har samlats in fr\u00e5n flera olika platser i tv\u00e5 l\u00e4nder: Sverige och Polen. Under datainsamlingen m\u00e4rkte vi att OIII-signalen \u00e4r v\u00e4ldigt svag, vilket ocks\u00e5 syns i slutresultatet. Det underl\u00e4ttades inte direkt av Thomas Bortle-skala, som ligger runt klass 7. All data stackades i Astro Pixel Processor och bearbetades d\u00e4refter vidare i PixInsight. D\u00e4r anv\u00e4nde vi endast LinearFit, Continuum Subtraction f\u00f6r Ha och OIII samt stretching av bilderna. Vi har inte anv\u00e4nt BlurXterminator eller NoiseXterminator. <\/p>\n\n\n\n

Den st\u00f6rsta delen av redigeringen, som sammanslagning av all data samt f\u00e4rger, kontrast m.m., gjordes i Photoshop. Totalt best\u00e5r bilden av cirka 190 timmar Ha\/OIII\/LRGB-data: Thomas (OSC): \u2022 Ha\/OIII: 109 h \u2022 RGB: 15 h Alex (mono): \u2022 Ha: 32 h \u2022 OIII: 20 h \u2022 LRGB: 13 h <\/p>\n\n\n\n

Vi vill visa M31 som den \u00e4r \u2013 men projektet forts\u00e4tter! Vi kommer samla in mer Ha- och OIII-data fram\u00f6ver . Teleskop\/objektiv: RedCat51. Montering: ZWO AM5. Kamera: ZWO Asi2600MC Pro , ZWO Asi294mm Pro. Ytterligare utrustning: Filters Ha\/Oiii Dualband OSC, HaOiiiLRGB mono. Plats: Sverige, Polen. Mjukvara: Astro Pixel Processor, Pixinsight, Photoshop. Filter: L, R, G, B, Ha, OIII. <\/p>\n\n\n\n

Fotograf: Alex Linde Thomas Hansson.”<\/p>\n\n\n\n

Bilder som dessa h\u00f6r naturligtvis \u00e4ven hemma p\u00e5 Tycho Brahe-s\u00e4llskapets egen astrofotosajt p\u00e5 face book. P\u00e5 sin egen fb-sajt noterar Thomas:<\/p>\n\n\n\n

The project started about a year ago, and data has been collected from several different locations in two countries: Sweden and Poland.During data collection, we noticed that the OIII signal is very weak, which is also visible in the final result. This was not exactly helped by my Bortle scale, which is around class 7.All data was stacked in Astro Pixel Processor and then further processed in PixInsight. There we only used LinearFit, Continuum Subtraction for Ha and OIII, and image stretching. We did not use BlurXterminator or NoiseXterminator.<\/p>\n\n\n\n

Most of the editing \u2014 such as combining all the data and adjusting colors, contrast, etc. \u2014 was done in Photoshop.<\/p>\n\n\n\n

In total, the image consists of about 190 hours of Ha\/OIII\/LRGB data:<\/p>\n\n\n\n

Thomas (OSC):<\/p>\n\n\n\n

\u2022 Ha\/OIII: 109 h<\/p>\n\n\n\n

\u2022 RGB: 15 h<\/p>\n\n\n\n

Alex (mono):<\/p>\n\n\n\n

\u2022 Ha: 32 h<\/p>\n\n\n\n

\u2022 OIII: 20 h<\/p>\n\n\n\n

\u2022 LRGB: 13 h<\/p>\n\n\n\n

We want to show M31 as it is \u2014 but the project continues!<\/p>\n\n\n\n

We will be collecting more Ha and OIII data going forward \"\ud83d\ude80\"\"\u2728\"<\/p>\n\n\n\n

#deepskyphotography<\/a>#astrophotography<\/a>#andromedagalaxy<\/a>#messier31<\/a>#m31<\/a>“<\/p>\n\n\n\n

Astrofysikaliskt finns h\u00e4r hur mycket som helst att diskutera. Vad ligger bakom de r\u00f6daktiga strukturerna? Tillh\u00f6r molnen Vintergatan? Det l\u00e5nga bl\u00e5 strecket ovanf\u00f6r M31? Tillh\u00f6r det M31? P\u00e5 kommande ASTB-m\u00f6te hoppas vi bilden ytterligare “klarnar”.<\/p>\n","protected":false},"excerpt":{"rendered":"

M31 i nytt ljus F\u00f6r en g\u00e5ngs skull st\u00e4mmer den banala rubriken, detta \u00e4r verkligen M31, Andromedagalaxen med celesta omnejder, i nytt ljus. Grattis till v\u00e5r ASTB:are Thomas Hansson och hans kollega Axel Linde som tillsammans presterat denna otroliga upptagning p\u00e5 sammanlagt fototid p\u00e5 190 timmar. Slutresultatet har utsetts till M\u00e5nadens bild p\u00e5 SAAF-sidan Nattmolnet.… L\u00e4s mer »Nr 6 2026<\/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\/98696"}],"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=98696"}],"version-history":[{"count":7,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/98696\/revisions"}],"predecessor-version":[{"id":98704,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/98696\/revisions\/98704"}],"wp:attachment":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/media?parent=98696"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/categories?post=98696"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/tags?post=98696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}