IN: Active galactic nuclei (A86-36901 16-90). Manchester, England and Dover, NH, Manchester University Press, 1985, p. 300-304.
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Orientation effects are believed to be important in sources which harbor relativistic jets in their nuclei. BL Lac type objects are interpreted as a type of this class of objects whose galaxy counterpart is a bright elliptical galaxy. This interpretation requires every bright elliptical galaxy to have a BL Lac type nucleus beamed usually away from the observer. The possibility of identifying M87 as one of those misaligned BL Lacs is discussed.