论文标题
伽马射线候选伽马射线的光谱观测。 X. 2018--2019的结果和oan-spm观察到了不确定类型的Blazar候选人
Optical spectroscopic observations of gamma-ray blazar candidates. X. Results from the 2018--2019 SOAR and OAN-SPM observations of blazar candidates of uncertain type
论文作者
论文摘要
第四个费米大面积望远镜源目录（4FGL）列出了5000多个伽马射线源，其统计显着性高于4 $σ$。该目录中列出的资源中约有23％是未识别/未相关的伽马射线来源，而约有26％的来源被归类为不确定类型的Blazar候选者（BCUS），缺乏光谱信息。为了探究UGS和BCUS候选人对应物的盛大性质，我们于2012年开始了光谱传播的运动，该活动的最新含量超过350个观察到的来源。在本文中，我们的十分之一的活动报告了37个来源的光谱观察，主要是BCUS，其观察结果主要是在观察者SandedroMártir和Southeral Prophrophysical Insprothatory and Southern Astrophrophys Research Vervatoration和Southern Astrophrophistory observatoration和Southern Saterveratoration和Southern Saterveratoration以及2010年8月2019年8月2019年之间的天文学研究中进行的。其余的归类为六个BL LACS星系为主导的，一个正常的星系。我们还能够测量20个来源的红移，包括10个BL LAC。与以前的分析一样，BCU的最大部分显示为BL LAC对象。
The fourth Fermi Large Area Telescope Source Catalog (4FGL) lists over 5000 gamma-ray sources with statistical significance above 4$σ$. About 23% of the sources listed in this catalog are unidentified/unassociated gamma-ray sources while ~26% of the sources are classified as blazar candidates of uncertain type (BCUs), lacking optical spectroscopic information. To probe the blazar nature of candidate counterparts of UGSs and BCUs, we started our optical spectroscopic follow up campaign in 2012, which up to date account for more than 350 observed sources. In this paper, the tenth of our campaign, we report on the spectroscopic observations of 37 sources, mostly BCUs, whose observations were carried out predominantly at the Observatorio Astronómico Nacional San Pedro Mártir and the Southern Astrophysical Research Observatory between August 2018 and September 2019. We confirm the BL Lac nature of 27 sources and the flat spectrum radio quasar nature of three sources. The remaining ones are classified as six BL Lacs galaxy-dominated and one normal galaxy. We were also able to measure the redshifts for 20 sources, including 10 BL Lacs. As in previous analyses, the largest fraction of BCUs revealed to be BL Lac objects.
