@article {28464,
	title = {Follow-up campaign of the Blazhko star RR Lyr},
	volume = {157},
	year = {2008},
	month = {2008/12/1},
	pages = {323 - 324},
	abstract = {Stars with changing Blazhko periods challenge the currently proposed hypotheses for the Blazhko effect. RR Lyr, the prototype of the class, is one of the best-studied Blazhko stars but it keeps on surprising its observers. We present the first results from a photometric follow- up campaign in 2006-2007 of the star. Multicolour data were gathered from 4 different observatories in the northern hemisphere. Our analysis focuses specifically on the period behaviour. We confirm the previously reported decrease of the modulation period.},
	isbn = {1021-2043},
	url = {https://ui.adsabs.harvard.edu/abs/2008CoAst.157..323K},
	author = {Kolenberg, K. and Ulus, N. D. and Beck, P. G. and Gazeas, K. D. and Tsantillas, S. and Robertson, C. W.}
}
