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Bl Lacertae Objects Beyond Redshift 1.3 - Uv-To-Nir Photometry And Photometric Redshift For Fermi/Lat Blazars, A. Rau, P. Schady, J. Greiner, M. Salvato, M. Ajello, E. Bottacini, N. Gehrels, P.M. J. Afonso, J. Elliott, R Filgas, D A. Kann, S Klose, T Krühler, M Nardini, A Nicuesa Guelbenzu, F Olivares E., A Rossi, V Sudilovsky, A C. Updike, Dieter H. Hartmann
Bl Lacertae Objects Beyond Redshift 1.3 - Uv-To-Nir Photometry And Photometric Redshift For Fermi/Lat Blazars, A. Rau, P. Schady, J. Greiner, M. Salvato, M. Ajello, E. Bottacini, N. Gehrels, P.M. J. Afonso, J. Elliott, R Filgas, D A. Kann, S Klose, T Krühler, M Nardini, A Nicuesa Guelbenzu, F Olivares E., A Rossi, V Sudilovsky, A C. Updike, Dieter H. Hartmann
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Context.Observations of the γ -ray sky with Fermi led to significant advances towards understanding blazars, the most extreme classof Active Galactic Nuclei. A large fraction of the population detected by Fermi is formed by BL Lacertae (BL Lac) objects, whosesample has always suff ered from a severe redshift incompleteness due to the quasi-featureless optical spectra.Aims.Our goal is to provide a significant increase of the number of confirmed high-redshift BL Lac objects contained in the 2 LACFermi/LAT cataloge.Methods.For 103 Fermi/LAT blazars, photometric redshifts using spectral energy distribution fitting have been obtained. The pho-tometry includes 13 broad-band filters from the far ultraviolet …