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arXiv 1302.2591astro-ph.CO
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BL Lac天体IV的ESO VLT光谱。完整样品的新光谱和性质

ESO VLT Optical Spectroscopy of BL Lac Objects IV. New spectra and properties of the full sample

Marco Landoni, Renato Falomo, Aldo Treves, Boris Sbarufatti, Martina Barattini, Roberto Decarli, Jari Kotilainen

摘要:

我们提出的光谱程序的最后一章,旨在推导红移或下限的BL紫胶天体使用中等分辨率光谱的红移。在这里,我们报告了2008-2009年获得的33个BL Lac天体候选者的新光谱,确认了25个源的BL Lac性质,并为5个天体获得了新的红移。这些新的观测结果与我们以前的数据相结合,以构建一个均匀的样品\sim 70 BL Lacs与高质量的光谱。所有这些光谱都可以在网站http://www.oapd.inaf.it/zbllac/上获得。平均光谱,光束性能的完整样本,讨论干预系统和未来的前景。

英文摘要:

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 for 5 objects we obtained new redshifts. These new observations are combined with our previous data in order to construct a homogeneous sample of \sim 70 BL Lacs with high quality spectroscopy. All these spectra can be accessed at the website http://www.oapd.inaf.it/zbllac/. The average spectrum, beaming properties of the full sample, discussion on intervening systems and future perspectives are addressed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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