Hard X-ray imaging of a solar two-ribbon flare on 1981 August 21

Details Hard X-ray imaging of a solar two-ribbon flare on 1981 August 21 Hard X-ray imaging of a solar two-ribbon flare on 1981 August 21

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...281l..51t&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 281, June 1, 1984, p. L51-L53.

Astronomy and Astrophysics

Astronomy

8

Astronomical Photography, Solar Flares, Solar X-Rays, Spaceborne Astronomy, X Ray Imagery, H Alpha Line, Japanese Spacecraft

Scientific paper

X-ray images (20-35 keV) were observed with the hard X-ray telescope aboard the Hinotori spacecraft for the solar X-ray burst associated with a typical two-ribbon H-alpha flare with sufficient separation for resolving in X-ray imaging whether or not the image is double over the ribbons. The X-ray images were, however, a single source elongated along one ribbon of the flare at the early phase of the burst. It is likely that this spatial coincidence is due to an apparent projection effect of the coronal X-ray source along a long ridge of the magnetic arcade connecting the two ribbons about 30 arc sec apart or along a long, twisted magnetic loop parallel to the two ribbons. In the later phase of the burst, the X-ray image became a compact single source with a spatial shift of the core by 10 arc sec-20 arc sec.

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