论文标题
$ fermi $ bl lacertae对象的经验“高信任”候选区
An empirical "high-confidence" candidate zone for $Fermi$ BL Lacertae objects
论文作者
论文摘要
在第三个由$ fermi $大面积望远镜清洁（3LAC）样品检测到的活性银河核的目录中，有402种不确定类型（BCU）的候选者。拟议的分析将有助于评估BCUS的潜在光谱扁平光谱类星体（FSRQ）与Bl lacertae（BL LACS）对象，这可以帮助您了解哪种是藏在Fermi样品中的最难以捉摸的Blazar类。通过研究3LAC样品，我们发现了$γ$ ray光子光谱指数（$γ_ {\ rm pH} $），可变性指数（VI）和无线电通量（$ {\ rm f_r} $）的一些关键值。我们进一步利用这些值来定义一个可用于对BCU进行分类的经验“高信心”候选区。在这样一个区域（$γ_{\ rm ph} <2.187 $，log $ {\ rm f_r} <2.258 $和$ {\ rm logvi <1.702} $），我们发现120 bcus可以被归类为具有更高信心的bl lac候选者（具有更高的信心率（带有错误的$ $ $ $ $ $ <1 cy）。我们的结果表明，仅基于$γ_{\ rm pH} $，vi和$ {\ rm f_r} $的直接观察数据，可以将BL LAC与费米观察区分开来，将BL LAC与费米观察区分开。
In the third catalog of active galactic nuclei detected by the $Fermi$ Large Area Telescope Clean (3LAC) sample, there are 402 blazars candidates of uncertain type (BCU). The proposed analysis will help to evaluate the potential optical classification flat spectrum radio quasars (FSRQs) versus BL Lacertae (BL Lacs) objects of BCUs, which can help to understand which is the most elusive class of blazar hidden in the Fermi sample. By studying the 3LAC sample, we found some critical values of $γ$-ray photon spectral index ($Γ_{\rm ph}$), variability index (VI) and radio flux (${\rm F_R}$) of the sources separate known FSRQs and BL Lac objects. We further utilize those values to defined an empirical "high-confidence" candidate zone that can be used to classify the BCUs. Within such a zone ($Γ_{\rm ph}<2.187$, log${\rm F_R}<2.258$ and ${ \rm logVI <1.702}$), we found that 120 BCUs can be classified BL Lac candidates with a higher degree of confidence (with a misjudged rate $<1\%$). Our results suggest that an empirical "high confidence" diagnosis is possible to distinguish the BL Lacs from the Fermi observations based on only on the direct observational data of $Γ_{\rm ph}$, VI and ${\rm F_R}$.
