Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Far-Ultraviolet Spectra of AGN: First Results from FUSE   Composite spectra derived from HST observations of moderate redshift (z~1)
quasars show that the peak of the spectral energy distribution is at ~1000 A,
and that the ionizing continuum falls off smoothly to shorter wavelengths as
$f_\nu \sim \nu^{-1.8}$. HUT and FUSE observations of nearby AGN (e.g., 3C 273)
show similar results. FUSE spectra reveal a wealth of detail in the 912-1200 A
spectral range, including multi-component intrinsic absorption in the O VI
doublet and Lyb, and surprisingly strong narrow-line emission from O VI
1032,1038. Monitoring observations of AGN below 1200 A are feasible, and such
experiments could help to unravel the structure of intrinsic absorbers in AGN
as well as the highest ionization portions of the broad-line region.

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The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
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The categories of this paper are: stat
32
The categories of this paper are: atom-ph
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The categories of this paper are: nlin
2
The categories of this paper are: math
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: q-fin