Peak flux distributions of solar radio type-i bursts from highly resolved spectral observations

K. Iwai, S. Masuda, Y. Miyoshi, F. Tsuchiya, A. Morioka, H. Misawa

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Solar radio type-I bursts were observed on 2011 January 26 by high resolution observations with the radio telescope AMATERAS in order to derive their peak flux distributions. We have developed a two-dimensional auto burst detection algorithm that can distinguish each type-I burst element from complex noise storm spectra that include numerous instances of radio frequency interference (RFI). This algorithm removes RFI from the observed radio spectra by applying a moving median filter along the frequency axis. Burst and continuum components are distinguished by a two-dimensional maximum and minimum search of the radio dynamic spectra. The analysis result shows that each type-I burst element has one peak flux without double counts or missed counts. The peak flux distribution of type-I bursts derived using this algorithm follows a power law with a spectral index between 4 and 5.

Original languageEnglish
Article numberL2
JournalAstrophysical Journal Letters
Issue number1
Publication statusPublished - 2013 May 1


  • Sun: corona
  • Sun: radio radiation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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