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LS I +61$^{\circ}$303 is an X-ray binary with a radio outburst every ~27days. Previous studies of the stellar system revealed radio microflaressuperimposed on the large radio outburst. We present here new radioobservations of LS I +61$^{\circ}$303 at 2.2 GHz with the Westerbork SynthesisRadio Telescope (WSRT). Using various timing analysis methods we findsignificant Quasi-Periodic Oscillations (QPOs) of 55 minutes stable over theduration of 4 days. We also use archival data obtained from the Suzakusatellite at X-ray wavelengths. We report here for the first time significantX-ray QPOs of about 2 hours present over the time span of 21 hours. We compareour results with the previously reported QPO observations and we conclude thatthe QPOs seem to be associated with the radio outburst, independent of theamplitude of the outburst. Finally, the different QPO time-scales are discussedin the context of magnetic reconnection.

Hour time-scale QPOs in the X-ray and radio emission of LS I +61$^{\circ}$303