Studying Blazhko RR Lyrae stars with the 24-inch telescope of the Konkoly Observatory

Details Studying Blazhko RR Lyrae stars with the 24-inch telescope of the Konkoly Observatory Studying Blazhko RR Lyrae stars with the 24-inch telescope of the Konkoly Observatory

2007-04-25

arxiv.org/abs/0704.3341v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in Astronomische Nachrichten (Astronomical Notes). 4 pages, 3 figs

Scientific paper

10.1002/asna.200710812

About a dozen field RR Lyrae stars have been observed with the 24-inch Heyde-Zeiss telescope of the Konkoly Observatory at Sv\'abhegy, Budapest, since its refurbishment in 2003. Most of the observing time is allocated for the investigation of the Blazhko modulation, a phenomenon that still does not have a satisfactory explanation. The obtained multicolour CCD observations are unique in extent. The accuracy of the measurements makes it possible to detect low amplitude modulation of the light curve as well. The discovery of Blazhko stars with low modulation amplitudes warns that the incidence rate of the Blazhko modulation is, in fact, much larger than it was previously expected. This makes the efforts exploring the cause of the modulation even more important. A summary of our measurements and results achieved during the last 3 years is presented.

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