Abstract We describe the development of the limb flare of 30 April 1980, 20:20 UT, as observed by the Hard X-ray Imaging Spectrometer (HXIS) aboard the Solar Maximum Mission (SMM). It consisted of a short-lived bright nucleus (FWHM < 10,000 km), just inside the Sun's limb; a longer lasting tongue, extending to a height of ∼ 30,000 km, and a more complicated feature, approximately situated at the Sun's limb. The tongue was a pre-existing magnetic structure that started emitting X-rays only a few seconds after the bright nucleus, and which had a slightly higher temperature than the nucleus; its X-ray emission may be caused by electrons escaped from the nucleus.


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    Title :

    Structural development of the X-ray limb flare of 30 April 1980


    Contributors:
    de Jager, C. (author) / Hoyng, P. (author) / Lafleur, H. (author) / Schadee, A. (author) / Svestka, Z. (author) / van Beek, H.F. (author) / van Tend, W. (author) / Fryer, R. (author) / Simnett, G.M. (author)

    Published in:

    Advances in Space Research ; 1 , 13 ; 251-254


    Publication date :

    1981-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English