cam a22 4500 282824782 CHVBK 20201020195513.0 130818s1994 sz a m 00 eng d Cette notice décrit l'exemplaire de thèse. 29.11.1995/geudbu/sjt (SNL)991002492379703976 (RERO)2077988 (Sz)55379-41snl_51 (Sz)vtls000055379 (Sz)000055379 Sz Sz eng fre s1as rero Orr Astrid The extreme ultraviolet imaging telescope array and multi-wavelength observations of active galactic nuclei par Astrid Dorothea Orr [S.l.] [s.n.] 1994 156 S. Fig. 30 cm Thèse sc. astron. et astrophys. Genève Literaturverz. Directeur de thèse: Professeur Thierry J.-L. Courvoisier Analyse: EUV radiation is strongly absorbed by the Earth's atmosphere and by interstellar gas. Numerical simulations of the EUVITA telescopes on board the future Spectrum-X-G satellite show that this EUV instrument will be able to detect and derive physical parameters of several classes of astrophysical sources. Simultaneous multi-wavelength observations of AGN, such as with Spectrum-X-G, are important for the study of their spectral components. Simultaneous UV and X-ray spectra of 8 Sy1 galaxies are analyzed. The maximum temperatures of the "blue bump" components are very similar in the sample, independent of luminosity and radio-loudness. This result cannot be easily explained by current models of "blue bump" emission. Non-simultaneous optical, UV and X-ray data of radio-quiet QSO 0914-62 reveal typical Sy1 spectral properties. There is evidence for moderate continuum and line variability. A broad UV absorption line (CIV 1549Å) has been detected for the first time in this source. Engl. Text mit franz. Zusfassung. extrême ultraviolet (spectre) (RERO)A009989061 rerovoc Galaxies actives (RERO)A021040825 rero noyau galactique (RERO)A009973326 rerovoc observation astronomique (RERO)A010014733 rerovoc sb 1995/19 18 snl-sb BK020300 XK020000 XK020000 SNL NB001 NB001 Nbq 22741 NB10010 RERO RE61001 RE61001 RE610010022 BGE Qvg 1877 RERO RE61012 RE61012 RE610120003 Th Ge 1994 ORR ex 2 OBST 37+1 RERO RE61012 RE61012 RE610120003 Th Ge 1994 ORR OBST 37 RERO RE61096 RE61096 RE610960003 DBUT 2463 SNL 100 1- Orr Astrid RERO 100 1- Orr Astrid (IDREF)168259354 cre