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		| Paper: | Comparing P Cygni's Spectroscopic Variability with that of other B-type Supergiants |  
		| Volume: | 233, P Cygni 2000: 400 Years of Progress |  
		| Page: | 149 |  
		| Authors: | Rivinius, T. |  
		| Abstract: | The spectral variability of OBA super- and hypergiants is reviewed, based on the monitorings conducted by the Landessternwarte Heidelberg Hot Star Group. The datasets of a sample of more than two dozen stars cover typically a couple of months and a spectral range from 3500 to 8600 A, with a resolving power of 20000. Using these data sets, a scheme of the variability, changing as a function of the position in the Hertzsprung-Russell diagram, is proposed. The spectral variability of P Cygni is compared to these results. |  
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