“News of the 1946 outburst reached the Saltsj\u00f6baden astronomers on the evening of February
10, by way of a telegram from the Central Bureau of the International Astronomical
Union, then located in Copenhagen and tasked with rapidly disseminating information about
astronomical objects such as newly discovered comets and novae. The telegram stated that
Armin Deutsch of the Yerkes observatory had discovered an eruption of T CrB on February
9 at 08h30m UT. When the telegram arrived in Saltsj\u00f6baden the sky was overcast, but it
cleared on the morning of February 11: at 08h30m UT, Bertil Lindblad and Yngve \u00d6hman
managed to observe the object in daylight, some two hours after sunrise, with the visual
50-cm tube of the double refractor.
Now, an intense scrutiny of the recurrent nova began at the Stockholm Observatory. Spectra
were taken using the Zeiss spectrograph mounted on the 1-m Grubb Parsons reflector,
and perhaps most important for future studies of that object, the object\u2019s brightness was
observed, with both photographic and visual photometry done by Gunnar Larsson-Leander.
The photographic magnitudes were measured on plates using the observatory\u2019s Schilt photometer,
and visual observations were made by the Argelander method. Larsson-Leander had
started out as an amateur astronomer doing observations of variable stars before becoming
a professional astronomer and was thus trained in both visual and photographic photometric
methods. Because of the nova\u2019s brightness, it was initially observed visually using a pair of
binoculars, and as it faded Larsson-Leander shifted to 9\u00b75- and 10-cm refractors.”<\/p>\n\n\n\n
(Tips: Vill du l\u00e4sa avsnittet p\u00e5 svenska s\u00e5 l\u00e5t AI \u00f6vers\u00e4tta.)<\/p>\n\n\n\n Bildk\u00e4lla: spaceweatherarchive <\/a><\/em><\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Notabelt \u00e4r ju att Bertil Lindblad <\/strong>och Yngve \u00d6hman<\/strong> \u00e4ven observerade T CrB n\u00e5gon timma efter soluppg\u00e5ngen!<\/p>\n\n\n\n Vi \u00e4r r\u00e4tt stolta \u00f6ver Gunnar Larsson-Leander, som ju blev professor i Lund och dessutom var ordf\u00f6rande i ASTB ett antal \u00e5r, b\u00f6rjade sitt liv bland variabla stj\u00e4rnor som amat\u00f6rastronom och hade goda kontakter i unga \u00e5r med Knut Lundmark.<\/strong> Han \u00e4r representerad i v\u00e5r svenska variabelkatalog och blev \u00e4ven k\u00e4nd f\u00f6r sina studier av DK Lacartae. <\/p>\n\n\n\n T CrB i dag? En del astronomer har profeterat om ett utbrott vilket \u00e5r som helst men just nu \u00e4r det lugnt. Senast 2027 lyder ett tips.<\/p>\n\n\n\n Gustavs artikel har rubriken “The 1946 Outburst of T CrB observed from Stockholm Observatory” och \u00e5terfinns i The Observatory,<\/em> Vol 146, February 2026, nr 1310. Han tackar \u00e4ven Eva Jurlander<\/strong> f\u00f6r hj\u00e4lpen i Lund.<\/p>\n\n\n\n Skrev H C Andersen <\/strong>n\u00e5gonsin om Tycho Brahe<\/strong>? Pettzy Ahlstr\u00f6m <\/strong>har svaret: Ja. Och det skedde i den vackra lilla sagan Svanboet\/Svanereden skriven 1852 i vilken svanen “Tycho Brahe” figurerar.<\/p>\n\n\n <\/p>\n\n\n\n Fr\u00e5n Hubble\/ESA\/NASA-teleskopteamet kommer en sp\u00e4nnande rapport<\/a> om jakten p\u00e5 galaxer som n\u00e4stan helt berst\u00e5r av m\u00f6rk materia. Ett fall r\u00f6r GDG-2 i Perseus, galaxen \u00e4r n\u00e4stan helt osynlig men har g\u00e5tt att f\u00e5 korn p\u00e5 genom n\u00e5gra ljusare klothopar. Bilden nedan f\u00f6rklarar vad det handlar om (galaxerna inom cirkeln tillh\u00f6r inte objektet)::<\/p>\n\n\n Bildk\u00e4lla: NASA, ESA, D. Li (Utoronto), Image Processing: J. DePasquale (STScI)<\/em><\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" Gunnar Larsson-Leander observerade T CrB 1946 Stort tack till kompisen Gustav Holmberg som i ikoniska tidskriften The Observatory skrivit om Gunnar Larsson-Leanders m\u00e4tningar av T CrB-utbrottet 1946. Gunnar var vid denna tid knuten till observatoriet i Saltsj\u00f6baden. Vi saxar ur Gustavs rapport: “News of the 1946 outburst reached the Saltsj\u00f6baden astronomers on the evening of… L\u00e4s mer »Nr 7 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":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/98713"}],"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=98713"}],"version-history":[{"count":10,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/98713\/revisions"}],"predecessor-version":[{"id":98726,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/98713\/revisions\/98726"}],"wp:attachment":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/media?parent=98713"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/categories?post=98713"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/tags?post=98713"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2026\/02\/newinfog.webp\")
<\/a><\/figure>\n\n\n\nH C Andersen skrev om Tycho Brahe<\/h2>\n\n\n\n
<\/a><\/figure><\/div>\n\n\nGalaxen som knappt kan anas<\/h2>\n\n\n\n
<\/a><\/figure><\/div>\n\n\n