Flavours of variability: 29 RRLyrae stars observed with Kepler

We present our analysis of Kepler observations of 29RR Lyrae stars, based on 138d of observation. We report precise pulsation periods for all stars. Nine of these stars had incorrect or unknown periods in the literature. 14 of the stars exhibit both amplitude and phase Blazhko modulations, with Blazhko periods ranging from 27.7 to more than 200d. For V445Lyr, a longer secondary variation is also observed in addition to its 53.2-d Blazhko period. The unprecedented precision of the Kepler photometry has led to the discovery of the the smallest modulations detected so far. Moreover, additional frequencies beyond the well-known harmonics and Blazhko multiplets have been found. These frequencies are located around the half-integer multiples of the main pulsation frequency for at least three stars. In four stars, these frequencies are close to the first and/or second overtone modes. The amplitudes of these periodicities seem to vary over the Blazhko cycle. V350Lyr, a non-Blazhko star in our sample, is the first example of a double-mode RRLyrae star that pulsates in its fundamental and second overtone modes. [PUBLICATION ABSTRACT]