HARMONICS OF THE 25-DAY PERIODICITY IN SEQUENCES OF SOLAR-X-RAY EVENTS (CORRECTED VERSION OF NU154)

I analyzed the data of measurements of the solar X-ray flux in the ran ge 1 - 8 angstrom, obtained on the SOLRAD 9 and 10 space vehicles in 1 969 - 1974. Time intervals were found from 3 to 6 months long, which h ad a quasiperiodic burst component; the periods varied between almost- equal-to 98 h (1969) and almost-equal-to 33 h (1972). The correspondin g frequencies form a sequence that can be interpreted, with an equal d egree of probability, as a set of harmonics of the fundamental frequen cy f0 = 465 +/- 10 nHz (a period of 24.9 +/- 0.05 days) and f0 = 415 /- 10 nHz (a period of 27.9 +/- 0.6 days). The harmonic pulsations cou ld result from modulation of the burst-like noise by a 25-day periodic process; e.g., rotation of the active longitude of the oblique rotato r, predicted by Bai and Sturrock (1993), which is located in the inter ior of the Sun.