Abstract
ON-February 10 the variable star T Coronæ Borealis, normally of magnitude 9, was seen to have blazed up to magnitude 3. This star had a typical nova outburst in 1866, when it was the first nova to be examined spectroscopically. Unlike other novæ, its spectrum after fading was of late type with strong absorption bands of titanium oxide. During the last twenty years, its spectrum has varied considerably mainly through the appearance in varying strength of emission lines due to hydrogen, neutral and ionized helium, oxygen and nitrogen. In addition, forbidden lines of oxygen and neon commonly observed in nebulæ have been observed.
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STRATTON, F., BUTLER, H. A Recurrent Nova. Nature 157, 270 (1946). https://doi.org/10.1038/157270d0
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DOI: https://doi.org/10.1038/157270d0
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