A quasi-periodic component was found at the maximum of the X-ray light curve for the June 10, 1990 solar flare detected by the Granat observatory. The pulsation period was 143.2 +/- 0.8 s. The intensity of the pulsing component is not constant; the maximum amplitude of the pulsations is similar to5% of the total flare intensity. An analysis of the data showed the characteristic size of the magnetic loop responsible for these pulsations to be similar to(1-3) x 10(10) cm.
Astronomy Letters-a Journal of Astronomy and Space Astrophysics, 2002, Vol 28, Issue 6, p. 397-400
magnetic loops; quasi-periodic pulsations; solar flares