ZBLLAC --BL蝎虎座天体的光谱数据库
ZBLLAC -- A spectroscopic database of BL Lacertae objects
摘要：
本文介绍了BL Lacertae（BLL）对象ZBLLAC的光学光谱数据库，网址为https://web.oapd.inaf.it/zbllac/。目前，它包含295 BLL的校准光谱。对于其中的约35%，我们报告了红移z的可靠测量，而对于35个来源，我们根据对介入吸收系统的检测，主要归因于Mg II（2800 Ang），对z设置了下限。我们在这里报告的数据库的体系结构和它的网络前端，允许过滤，查询和交互式地探索数据。通过给出红移的分布和探测到的发射线的报告，我们讨论了本数据集中物体的一些性质，这些发射线主要是禁止的，并归因于[O II]（3737 Ang）和[O III]（5007 Ang）。最后，我们讨论了在35个BLL中检测到的干预吸收系统，这些系统允许我们对它们的距离设置下限。
英文摘要：
This paper describes the database of optical spectra of BL Lacertae (BLL) objects ZBLLAC available at the URL https://web.oapd.inaf.it/zbllac/. At the present date, it contains calibrated spectra for 295 BLL. For about 35% of them, we report a firm measure of redshift z while for 35 sources we set a lower limit on z based on the detection of intervening absorption systems, mainly ascribed to Mg II (2800 Ang). We report here on the architecture of the database and on its web front-end that permits to filter, query and interactively explore the data. We discuss some properties of the objects in the present dataset by giving the distribution of the redshifts and reporting on the detected emission lines, which turn out to be mainly forbidden and ascribed to [O II] (3737 Ang) and [O III] (5007 Ang). Finally, we discuss on intervening absorption systems detected in 35 BLLs that allow us to set lower limits to their distance.
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