Malaga AGU paper
• Tapio Pursimo,
• Roopesh Ojha,
• Josefa Becerra
Tapio Pursimo
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Roopesh Ojha
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Josefa Becerra
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Abstract

We present spectroscopic identification for a sample of 3LAC $$\gamma$$-ray sources, classifed as Blazars of Unknown type (BCU). The 3LAC catalogue had originally 460 BCUs out of 1591 objects. The low resolution spectroscopy was carried out using 2-4 metre class telescopes. Our selection is biased towards high Comton Dominance objects, as the initial idea was search for potential TeV-sources. All 34 observed targets have weak emission lines and the one (?) low redshift object shows only absorption lines of the host galaxy. Our

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