Flares observed by the normal incidence X-ray telescope on 1989 September 11

Details Flares observed by the normal incidence X-ray telescope on 1989 September 11 Flares observed by the normal incidence X-ray telescope on 1989 September 11

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...376..797h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 376, Aug. 1, 1991, p. 797-802.

Computer Science

Sound

10

Solar Flares, Solar X-Rays, X Ray Telescopes, Coronal Loops, Rocket Sounding, Solar Magnetic Field

Scientific paper

Two solar flare events have been observed in soft X-rays during a sounding-rocket flight of the Normal-Incidence X-ray Telescope payload on September 11, 1989. The flare in X-rays involves a single bright loop crossing the neutral line, and having its footpoints at the southern ends of the ribbons; this loop accounts for more than 66 percent of the emission. Within the remainder of each of the flare ribbons, a complex coronal structure is also observed to be interacting with the main flare loop. A second event, in an active region at the limb, has a strong correlation with H-alpha images obtained at the same time. This indicates the coexistence, and indeed the close proximity, of coronal and chromospheric temperature material. Interpretations of this phenomenon are discussed.

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