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ESO VERY LARGE TELESCOPE OPTICAL SPECTROSCOPY OF BL LACERTAE OBJECTS. IV. NEW SPECTRA AND PROPERTIES OF THE FULL SAMPLE
Tekijät: Landoni M, Falomo R, Treves A, Sbarufatti B, Barattini M, Decarli R, Kotilainen J
Kustantaja: IOP PUBLISHING LTD
Julkaisuvuosi: 2013
Journal: The Astronomical Journal
Tietokannassa oleva lehden nimi: ASTRONOMICAL JOURNAL
Lehden akronyymi: ASTRON J
Artikkelin numero: ARTN 114
Numero sarjassa: 4
Vuosikerta: 145
Numero: 4
Sivujen määrä: 12
ISSN: 0004-6256
DOI: https://doi.org/10.1088/0004-6256/145/4/114
Tiivistelmä
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 similar to 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.
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 similar to 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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