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Very interesting thread.
Could I make useful spectra of the SN with my StarAnalyzer 100?
Yes it is certainly reachable with a Star Analyser for example
https://britastro.org/observations/observation.php?id=20230523_183229_5116a1a27f78a1ea
https://britastro.org/observations/observation.php?id=20230523_194606_cc526483f5e34422but the features seen earlier have greatly reduced and at the moment even with higher resolutions it is not showing very much except a slowly cooling blue continuum. Here is the evolution with my ALPY600
https://britastro.org/specdb/data_graph.php?obs_id=13786%2C13783%2C13778%2C13774&multi=yes&legend_pos=neCheers
RobinIt seems that the R and B are slowly swapping dominance!
Yes my spectrum from last night shows it cooling further to a black body temperature of ~12000K and a fit to an A3v star continuum with a B-V = +0.1
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Yes my spectrum from last night shows it cooling further to a black body temperature of ~12000K and a fit to an A3v star continuum with a B-V = +0.1
Here’s today’s RVB magnitude plot. The cooling clearly visible with the latest point B-V = +0.12.
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So B mag peaked in just 5 days from the explosion on the 18th. That’s pretty fast I think, even for a type II
Sky & Telescope’s Bob King has provided a simple overlay of M101 and the supernova onto the AAVSO chart, if it helps visual observers
https://skyandtelescope.org/wp-content/uploads/SN-2023ixf-chart-AAVSO.jpg
Alex.
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