The UV spectrum of the BL Lac object PKS 0521-36

Details The UV spectrum of the BL Lac object PKS 0521-36 The UV spectrum of the BL Lac object PKS 0521-36

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203..565d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 203, May 1983, p. 565-570.

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12

Bl Lacertae Objects, Stellar Spectra, Ultraviolet Spectra, Iue, Lyman Spectra, Spectral Energy Distribution

Scientific paper

Ultraviolet observations (1200-3000 Å) with the IUE satellite of the BL Lac object PKS 0521-36 are presented. The only emission line which appears clearly in the spectrum is Lyα, which is asymmetric with a component displaced ≡3000 km s-1 to the red. The intensity of the line and the upper limits on other lines are compared with the model calculations on QSOs and Seyfert nuclei by Kwan & Krolik. The continuous energy distribution is discussed, combining non-simultaneous observations from the ultraviolet to the infrared. The spectral range of the non-thermal source from far IR to far UV can be described by a single power law of index -1.5.

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