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Time-frequency analysis of data from the GALLEX and GNO solar neutrinoexperiments shows that some features in power-spectrum analyses of thosedatasets are due to aliasing. We normalize data for each of the fourexperiments in the GALLEX series, concatenate the resulting normalized data,and then form time-frequency displays. We also form time-frequency displays ofthe two principal modulations found in the data, at 11.87 yr-1 and at 13.63yr-1, and of the datasets formed by subtracting these modulations from theactual (normalized) data. The results suggest that the true modulation is thatat 11.87 yr-1, consistent with the results of our earlier analysis of Homestakesolar neutrino data. Comparison with helioseismology data indicates thatmodulation is occurring either in the radiative zone just below the tachocline,presumably by the RSFP (resonant spin-flavor precession) process, or in thecore, presumably due to inhomogeneities and fluctuations in the nuclear-burningprocess.

Time-Frequency Analysis of GALLEX and GNO Solar Neutrino Data: Evidence Suggestive of Asymmetric and Variable Nuclear Burning