High spectral resolution, high sensitivity microwave and associated hard X-ray bursts

H. S. Sawant, J. R. Cecatto, B. R. Dennis, D. E. Gary, G. J. Hurford

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5 Scopus citations


We have carried out mm-wavelength (18 - 23) GHz observations of solar bursts in June 1989, in Brazil. Nine of the bursts were observed simultaneously with the Hard X-ray Burst Spectrometer (HXRBS) on the Solar Maximum Mission (SMM). The Owens Valley Radio Observatory (OVRO) observed five of these events from 1 to 18 GHz. To date, we have analyzed six of these events and the preliminary results are: (i) The turnover frequency of all of these bursts were in the frequency range of 7 - 11 GHz and the radio spectral index ranged from -0.3 to -5.3; (ii) In three bursts, dominant features of high energy (≥ 200 keV) X-rays coincided in time with mm-wavelength peaks, suggesting that the high energy electrons are responsible for the mm-wavelength emission.

Original languageEnglish (US)
Pages (from-to)191-194
Number of pages4
JournalAdvances in Space Research
Issue number9
StatePublished - Sep 1993
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • General Earth and Planetary Sciences


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