Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...282..793t&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 282, July 15, 1984, p. 793-798.
Astronomy and Astrophysics
Astrophysics
22
K Lines, Solar Flares, Solar X-Rays, Bursts, Monte Carlo Method, Proportional Counters, Scintillation Counters, Solar Spectra, Spectrometers
Scientific paper
High-resolution observations of the solar flare event of 20:09:30 UT on July 28, 1981, obtained with the Bragg crystal spectrometers (line spectra of soft X-rays at 175-195 pm) and the soft-X-ray and hard-X-ray spectrometers (continuum spectra at 1.5-12.5 and 18-400 keV, respectively) of the Japanese solar-maximum satellite Hinotori are reported. The data are presented in graphs, sample spectra, and tables and analyzed. An intense K-alpha Fe emission is found to be associated with a hard X-ray burst with a power-law photon distribution from below 10 to above 100 keV during the first part of the flare. The K-alpha emission during the X-ray burst and after its decay are attributed to photospheric neutral-Fe fluorescence induced by the burst X-rays and thermal X-rays, respectively.
Nitta Nariaki
Tanaka Kanenobu
Watanabe Ta.
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