Microwave and hard X-ray observations of a solar flare with a time resolution better than 100 MS

Details Microwave and hard X-ray observations of a solar flare with a time resolution better than 100 MS Microwave and hard X-ray observations of a solar flare with a time resolution better than 100 MS

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...84..311k&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 84, April 1983, p. 311-319. Research supported by the Fundacao de Amparo aPesquisa do Estad

Physics

30

High Resolution, Microwave Emission, Solar Flares, Time Measurement, X Rays, Cross Correlation, Relativistic Electron Beams, Temporal Resolution, Time Lag, X Ray Spectroscopy

Scientific paper

Simultaneous microwave and X-ray observations are presented for a solar flare detected on 1980 May 8 starting at 1937 UT. The X-ray observations were made with the Hard X-ray Burst Spectrometer on the Solar Maximum Mission and covered the energy range from 28-490 keV with a time resolution of 10 ms. The microwave observations were made with the 5 and 45 foot antennas at the Itapetinga Radio Obervatory at frequencies of 7 and 22 GHz, with time resolutions of 100 ms and 1 ms respectively. Detailed correlation analysis of the different time profiles of the event show that the major impulsive in the X-ray flux preceded the corresponding microwave peaks at 22 GHz by about 240 ms. For this particular burst the 22 GHz peaks preceded the 7 GHz by about 1.5s. Observed delays of the microwave peaks are too large for a simple electron beam model but they can be reconciled with the speeds of shock waves in a thermal model. Previously announced in STAR as N82-30215

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