Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.302..317t&link_type=abstract
Nature, vol. 302, Mar. 24, 1983, p. 317-319.
Astronomy and Astrophysics
Astronomy
52
Microwave Emission, Pulsed Radiation, Solar Radio Bursts, Solar X-Rays, X Ray Astronomy, Cross Correlation, Satellite Observation, Temporal Distribution
Scientific paper
A solar subflare on Nov. 4, 1981 was monitored at subsecond intervals using the X ray detector on the Hinotori satellite and the ground-based 45 ft Itapetinga Radio dish at 22 and 44 GHz. The X ray monitor had a sensitivity in the 30-40 keV range with 7.81 msec resolution, while the radiotelescope featured 10 msec resolution. Six distinct time structures were observed in the burst, which had a peak-to-peak X-ray pulsation variation of about 30 percent and of radio pulsations approximately 10 percent of the background level. Cross correlations were found for the X ray and radio fluxes, and were found to repeat in peaks with a periodicity of 290 msec, 300 msec, and 320 msec. The 22 and 44 GHz pulsations were in phase to within 62.5 msec. Various physical processes underlying the subsecond pulsations are discussed
Costa Joaquim E. Rezende
Degaonkar S. S.
Kaufmann Patrik
Nitta Nariaki
Ohki Kenichiro
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