The extreme ultraviolet imaging telescope array and multi-wavelength observations of active galactic nuclei

Diplôme Thèse The extreme ultraviolet imaging telescope array and multi-wavelength observations of active galactic nuclei eng 1994-12-13 author Orr Astrid 27008 director Courvoisier Thierry 22894 Administration de la faculté des sciences (SIAD) 156 10.13097/archive-ouverte/unige:183164 Sc. 2729 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 Dewey 520 26 Département d'astronomie 12 false ffde4565-52f4-4009-bc9c-db85e4451e9a Thesis Public _orr_thèse.pdf 13861063 application/pdf Restricted 2094-12-13 db7df040809b5946a3da29e38a261f2b17d435bbcd91c4985447ed2dbb716617 0a679ea2-8eac-4661-a0c2-265a58a68132 Imprimatur Public orr_imprimatur.pdf 368577 application/pdf fc9560585d8798ed062681c94ee9137ea4ce8909a2bfac3cfcd18cf47809aa45 embargoedAccess Faculté des sciences / Département d'astronomie

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The extreme ultraviolet imaging telescope array and multi-wavelength observations of active galactic nuclei				1994	158	0

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Orr, Astrid