N.S. Meshalkina, A.T. Altyntsev
Institute of Solar-Terrestrial Physics Siberian Branch of
the Russian Academy of Sciences, Lermontov St. 126, Irkutsk 664033,
Russia
We investigated the relation between temporal profiles in microwaves and hard X-rays using a large data set. A comprehensive data set of 162 events with fine temporal structures obtained with Siberian Solar Radio Telescope (SSRT) has been analyzed. These events were recorded with the SSRT (5.7 GHz, 14 ms resolution) for the period from Feb 2002 to Jul 2005 and were simultaneously observed with the RHESSI (10 ms, 12-50 keV). It is shown that the subsecond pulses occurring are associated with HXR brightening. For the most of events there are no peak-to-peak correspondence between the radio subsecond pulses and the associated 12-50 keV hard X-ray emission. We have found only four events (01 Jun 2002, 26 Apr 2003, 24 Sep 2003, 26 Jul 2004) where we observed a very clear response in the hard X-rays. The features of these events have been analyzed in detail. The possible scenarios for explaining the observed correlation degree of temporal profiles are discussed.