EXOSAT observations of a broad absorption-line quasar: PHL 5200

Singh, K. P. ; Westergaard, N. J. ; Schnopper, H. W. (1987) EXOSAT observations of a broad absorption-line quasar: PHL 5200 Astronomy and Astrophysics, 172 (1-2). L11-L13. ISSN 0004-6361

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In our observations of the 45' (FWHM) region centered on a broad absorption-line quasar PHL 5200 perfor- med with the medium energy (ME) and low energy (LE) experiments on board EXOSAT Observatory we have detected X-ray emission in the 2-6 keV energy band. No sources are detected in the 0.05-2.0 keV energy band. These observations have been used to suggest that the quasar rather than a cluster of galaxies or a star in the ME field is the optical counterpart of the 2-6 keV X-ray source. Consistency with the soft X-ray observations made with Einstein Observatory about 5 years prior to the EXOSAT observation requires either a highly variable X-ray source or a higher absorbing column (≈ 1022 cm-2) than is needed to explain the EXOSAT observations. A very high minimum column density (>1022 cm-2) is needed if the absorption is intrinsic to the quasar. The 4 keV monochromatic luminosity emitted by the quasar is 9.1 × 1028 ergs s-l Hz-I.

Item Type:Article
Source:Copyright of this article belongs to EDP Sciences.
Keywords:Quasars; PHL 5200 X-rays
ID Code:76755
Deposited On:05 Jan 2012 15:39
Last Modified:18 May 2016 20:19

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