ESO VLT optical spectroscopy of BL Lacertae objects. III. An extension of the sample

B. Sbarufatti, S. Ciprini, J. Kotilainen +4

We present results of an ongoing program at the ESO VLT for spectroscopy of BL Lac objects lacking a firm redshift estimate and here we report on 15 objects. For 11 sources we conf…