排序方式: 共有8条查询结果,搜索用时 15 毫秒
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A. Boelee C. de Jager A. Duijveman M. Galama R. Hoekstra P. Hoyng J. P. Imhof H. Lafleur H. V. A. M. Maseland W. A. Mels A. Schadee J. Schrijver Z. Svestka H. F. van Beek P. van Rens J. J. M. van der Laan W. van Tend F. Werkhoven G. Wiersma W. Zandee 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》1981,1(13):255-266
We have selected four widely different flares from the early period of operations of the Hard X-Ray Imaging Spectrometer (HXIS) on SMM to illustrate the characteristic imaging properties of this experiment. For the small flare of April 4, 1980, we demonstrate the instrument's capability for locating a compact source. In the weak, but extensive, flare of April 6 we show how well the instrument can display spatial structure, and also the low level of the instrument background. In the 1B flare of April 7 we are able to locate positions of the X-ray emission in the soft and hard channels, and estimate the positional variations of the emission patches. Finally, in the IN flare of April 10, which produced the strongest hard X-ray burst we have seen so far, we repeat some of the studies made for the April 7 event, and also demonstrate the capability of the HXIS instrument to study the development, with high time resolution, of individual 8″ × 8″ elements of the flare. 相似文献
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Space Science Reviews - 相似文献
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Space Science Reviews - 相似文献
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E. Haug G. Elwert P. Hoyng 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》1984,4(7):211-213
X-ray images of the 18 November 1980 limb flare taken by the HXIS instrument aboard SMM were analysed. The hard X-rays originated from three spots on the SW limb of the solar disk with different altitudes and time evolution. The locations of the brightest spots in hard and soft X-rays are compared with the predictions of flare models. The X-ray spctra from the pixels with highest count rates can be fitted by power laws. The spatial variation of the spectral index is in agreement with the existence of a non-thermal electron component. 相似文献
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C. de Jager P. Hoyng H. Lafleur A. Schadee Z. Svestka H. F. van Beek W. van Tend 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》1981,1(13):251-254
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. 相似文献
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