TY - JOUR
T1 - Eso very large telescope optical spectroscopy of bl lacertae objects. iv. new spectra and properties of the full sample
AU - Landoni, M.
AU - Falomo, R.
AU - Treves, A.
AU - Sbarufatti, B.
AU - Barattini, M.
AU - Decarli, R.
AU - Kotilainen, J.
PY - 2013/4
Y1 - 2013/4
N2 - We present the last chapter of a spectroscopy program aimed at deriving the redshift or a lower limit to the redshift of BL Lac objects using medium-resolution spectroscopy. Here we report new spectra for 33 BL Lac object candidates obtained in 2008-2009, confirming the BL Lac nature of 25 sources and obtaining new redshifts for 5 objects. These new observations are combined with our previous data in order to construct a homogeneous sample of ∼70 BL Lac objects with high-quality spectroscopy. All these spectra can be accessed at the Web site http://www.oapd.inaf.it/zbllac/. The average spectrum, beaming properties of the full sample, discussion of intervening systems, and future perspectives are addressed.
AB - We present the last chapter of a spectroscopy program aimed at deriving the redshift or a lower limit to the redshift of BL Lac objects using medium-resolution spectroscopy. Here we report new spectra for 33 BL Lac object candidates obtained in 2008-2009, confirming the BL Lac nature of 25 sources and obtaining new redshifts for 5 objects. These new observations are combined with our previous data in order to construct a homogeneous sample of ∼70 BL Lac objects with high-quality spectroscopy. All these spectra can be accessed at the Web site http://www.oapd.inaf.it/zbllac/. The average spectrum, beaming properties of the full sample, discussion of intervening systems, and future perspectives are addressed.
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U2 - 10.1088/0004-6256/145/4/114
DO - 10.1088/0004-6256/145/4/114
M3 - Article
AN - SCOPUS:84875290500
SN - 0004-6256
VL - 145
JO - Astronomical Journal
JF - Astronomical Journal
IS - 4
M1 - 114
ER -