The high-luminosity BL Lacertae object PKS 0823 - 22

Details The high-luminosity BL Lacertae object PKS 0823 - 22 The high-luminosity BL Lacertae object PKS 0823 - 22

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...353..114f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 353, April 10, 1990, p. 114-117.

Other

15

Astronomical Spectroscopy, Bl Lacertae Objects, Gravitational Lenses, Luminosity, Absorption Spectra, Charge Coupled Devices, Red Shift, Spectral Energy Distribution

Scientific paper

Simultaneous IR, optical, and UV observations of the BL Lac object PKS 0823 - 22 are presented. The identification of the observed absorption doublet at 5341 and 5355 A with Mg II 2796 and 2803 A gives an absorption redshift z(abs) = 0.910. At this redshift, the object is one of the most luminous of its class with M(V) less than about -29.4. The spectral flux distribution of the source and the properties of intervening absorbing matter are discussed. Analogies with other sources suggest that the object may be gravitationally lensed.

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