Abstract
A spectroscopic study of blazars at medium resolution (λ/Δλ ≈ 500 to 2000) is being carried on aimed at: ί) determining the yet unknown redshift of a sizable sample of objects through detection of weak spectral features, either in emission or in absorption; ίί) monitoring intensity and profile of the broad emission fines present in selected objects, in order to investigate their correlation with continuum intensity. Preliminary results obtained on PKS 0521-365, PKS 0537-441, and PKS 0823-22 are presented.
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Falomo, R., Tanzi, E.G., Treves, A. (1989). A spectroscopic study of blazars at medium resolution. Observations of PKS 0521-36, PKS 0537-44 and PKS 0823-22. In: Maraschi, L., Maccacaro, T., Ulrich, M.H. (eds) BL Lac Objects. Lecture Notes in Physics, vol 334. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0031146
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DOI: https://doi.org/10.1007/BFb0031146
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