Time Variations of the Solar Neutrino Flux Data from Sage and Gallex-Gno   Detectors by Simple Denoising Algorithm Using Wavelet Transform
  We have used Simple Denoising Algorithm using Wavelet Transform on the monthly solar neutrino flux data from (1) SAGE detector during the period from 1st January 1990 to 31st December 2000; (2) SAGE detector during the period from April 1998 to December 2001; (3) GALLEX detector during the period from May 1991 to January 1997; (4) GNO detector during the period from May 1998 to December 2001; (5) GALLEX-GNO detector (combined data) from May 1991 to December 2001 and (6) average of the data from GNO and SAGE detectors during the period from May 1998 to December 2001. (1) exhibits periodicity around 20, 27, 36, 70, 90 and 114 months. (2) shows periodicity around 21, 28, 31 and 33 months. For (3) we observe periodicity around 24, 40, 54, 57, 59, 62 and 64 months. For (4) periodicity is seen around 23, 30 and 34 months. (5) gives periodicity around 49, 57, 64, 74, 79, 88, 95 and 99 months while (6) shows periodicity around 24, 32, 35 and 38 months. We have found almost similar periods in the solar flares, sunspot data, solar proton data which indicates that the solar activity cycle may be due to the variable character of nuclear energy generation inside the sun. 
Koushik Ghosh and Probhas Raychaudhuri