Observation of the powerful solar flare of October 27, 2002 on the far side of the sun

• Published in: Astronomy reports 2012-10, Vol.56 (10), p.805-812
• Main Authors: Vybornov, V. I., Livshits, M. A., Kashapova, L. K., Mitrofanov, I. G., Golovin, D. V., Kozyrev, A. S., Litvak, M. L., Sanin, A. B., Tret’yakov, V. I., Boynton, W., Shinohara, K., Hamara, D.
• Format: Article
• Language: English
• Subjects: Astronomy; Observations and Techniques; Physics; Physics and Astronomy; Plasma; Propagation; Solar flares; Solar physics
• ISSN: 1063-7729; 1562-6881
• DOI: 10.1134/S1063772912100083

Observations of the hard X-ray and radio event of October 27, 2002 are analyzed. This flare was observed from near-Martian orbit by the HEND instrument developed at the Space Research Institute of the Russian Academy of Sciences and installed on the Mars Odyssey satellite. Although this powerful flare was observed far over the eastern solar limb, the extended source associated with the flare was detected by RHESSI at energies up to about 60 keV. The eruptive event was observed in the radio at the Nobeyama Radio Observatory. The properties of the X-ray radiation are used to calculate the spectrum of the accelerated electrons responsible for the observed radiation, assuming that the target is thick for a Martian observer and thin for a terrestrial observer. The results are compared with the results of radio observations. The conditions for electron propagation in the corona are discussed.