Redshifts of three BL Lacertae objects - PKS 0118 - 27, PKS 0829 + 04, and MC 1057 + 10

Astronomy and Astrophysics – Astronomy

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Bl Lacertae Objects, Red Shift, Star Distribution, Absorption Spectra, Emission Spectra, Line Spectra, Optical Emission Spectroscopy

Scientific paper

Optical spectroscopy of three BL Lacertae objects which makes it possible to derive the previously unknown redshift of the objects is presented. For PKS 0118 - 27 an absorption doublet of Mg II at z = 0.559 is found. For PKS 0829 + 04 spectral signature of stellar population is detected at z = 0.18. Spectra of MC 1057 + 10 show broad emission lines which, identified with Mg II 2800 and semiforbidden C II 1909, yield z = 1.317.

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