Ultraviolet observations of a bright southern quasar

Sofia Kirhakos, Michael A. Strauss, Amos Yahil, Mark Griffith, Karl B. Fisher

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We present low-resolution ultraviolet spectra of the QSO 09149 - 6206 (z = 0.057) obtained with the International Ultraviolet Explorer. The spectrum shows strong emission lines of Ly α, C IV, C III], Mg II, and Fe II. The Fe II blend centered at 2080 Å is unusually strong; this may be a consequence of overcorrection for the 2175 Å silicate feature in the reddening curve. Absorption features from the Milky Way are clearly present. There is no evidence for further absorption features due to objects beyond our Galaxy and in the foreground of the QSO. After correcting for Galactic reddening, the spectral energy distribution is very flat from ultraviolet to far-infrared wavelengths; there is no big blue bump in this object. The QSO is detected weakly at 6 cm; we have only upper limits at x-ray wave-lengths. The upper limit to the optical-x-ray spectral index is - 1.35. We have measured the Hα line strength from a spectrum taken under photometric conditions; the Ly α/Hα line ratio is 0.8 after correction for reddening. A spectrum of the fuzz surrounding the QSO shows narrow emission lines of Ha, [N II], [S II], and [O I].

Original languageEnglish (US)
Pages (from-to)1933-1938
Number of pages6
JournalAstronomical Journal
Issue number6
StatePublished - Dec 1991
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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