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Session 73 - Solar Space Observations, SOHO & SERTS.
Display session, Friday, January 09
Exhibit Hall,

[73.07] Solar Active Region Movies seen by the SOHO Extreme-ultraviolet Telescope

J. S. Newmark, B. Thompson (Space Applications Corp.), J. B. Gurman (NASA/GSFC), J. P. Delaboudiniere (Inst. d'Astrophysique Spatiale, U. Paris), M. Aschwanden (U. Maryland), H. Mason (Dept. Applied Mathematics and TheoreticalPhysics, Cambridge U., U.K.)

The Extreme-ultraviolet Imaging Telescope (EIT) on board the SOHO (SOlar and Heliospheric Observatory) satellite provides wide-field images of the corona and transition region on the solar disc and up to 1.4 solar radii above the limb. Its normal incidence multilayer-coated optics select spectral emission lines from FeIX (171 Ang), FeXII (195 Ang), FeXV (284 Ang), and HeII (304 Ang) with 2.6 arcsecond resolution which allow us to describe Solar activity over a wide temperature range. EIT is providing unique EUV observations of the structure and evolution of active regions. Here we show movies of active region 8059 from July 3-10, 1997. The high temporal variability of the AR loops is very evident. Initial temperature and density diagnostics are explored as well as a comparison with diagnostics from the SOHO-CDS instrument.

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