Preflare X-ray morphology of active regions observed with the AS & E telescope on SKYLAB

Details Preflare X-ray morphology of active regions observed with the AS & E telescope on SKYLAB Preflare X-ray morphology of active regions observed with the AS & E telescope on SKYLAB

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...47..157k&link_type=abstract

(NASA, IAU, IUGG, and International Council of Scientific Unions, Workshop on Flare Build-up Study, Falmouth, Mass., Sept. 8-11,

Astronomy and Astrophysics

Astronomy

9

Skylab Program, Solar Flares, Solar X-Rays, Spaceborne Astronomy, Grazing Incidence Telescopes, H Alpha Line, Morphology, Solar Activity Effects, X Ray Astronomy, X Ray Telescopes

Scientific paper

Images of active regions obtained with the grazing-incidence X-ray telescope aboard Skylab during the 20-min period preceding eight small X-ray flares are used to investigate the X-ray morphology of the preflare state of the active regions for any evidence of flare buildup. Not a single case is found where preflare brightening occurred in and only in the region which subsequently flared. For two events, no changes in the X-ray morphology of the preflare active region were noted up to within 2 min of the flare onset. Thus, no systematic evidence is found for a preflare buildup in any of these eight events.

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