ИСТИНА

The flares, whose the hard X-ray (HXR) and microwave (MW) light curves consist of several bursts or peaks, always raise lot of questions. One of them is about nature of the continuous energy release and the role of accelerated particles in the flare process. Scenario of the studied flare could be based on series of reconnections or development of single energy input process, or an alternation of both phenomena. Analysis of the evolution of the HXR and MW emission coupled with observation of chromospheric response allows to reveal and to separate these kinds of processes not only qualitatively but quantitatively. We present results of study of two ribbon M3.2 solar flare (SOL2013-05-17T08:43) observed on May 17, 2013. Observations of RATAN-600 and 10-antenna radio heliograph prototype of the multi-frequency Siberian Radioheliograph and the Siberian Solar Radio Spectropolarimeters (2-24 GHz and 4-8GHz) allowed to study spectral and spatial evolution of MW flare sources. We also used H-alpha slit-jaw images from HSFA-2 in Ondrejov and in the HXR data by RHESSI and FERMI as well as EUV data and magnetograms obtained by SDO. A relation between the appearance of H-alpha kernels and peaks in HXR emission was studied thoroughly and we used it for explaining of evolution of flare loop foot-points in case of absence of HXR data. Obtained results are discussed and compared with existing theoretical models.