Quasar lenses and pairs in the VST-ATLAS and Gaia
Quasar lenses and pairs in the VST-ATLAS and Gaia
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VST-ATLAS 和 Gaia 中的类星体透镜和对
DOI：
10.1093/mnras/stx3226
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发表时间：
2017
影响因子：
4.8
通讯作者：
Motta, V
中科院分区：
文献类型：
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作者：
Agnello, A;Schechter, P L;Morgan, N D;Treu, T;Grillo, C;Malesani, D;Anguita, T;Apostolovski, Y;Rusu, C E;Motta, V
我们报告的发现结果，从类星体透镜搜索在ATLAS-DR 3的公共足迹。2016年在2.6米北欧光学望远镜（La Palma）和3.6米新技术望远镜（La Silla）进行的光谱后续活动产生了7对类星体，它们在相同的红移和单调通量比下表现出相同的谱线（以下简称NIQ，几乎相同的类星体对）。A0140−1152（01 h40 m030 - 11 d52 m190，zs= 1.807）的麦哲伦光谱证实它是一个透镜，偏转器zl = 0.277，爱因斯坦半径θE=（0.73 ± 0.02）arcsec。NIQ A2213−2652（22 h13 m384 - 26 d52 m271）的后续成像显示了偏转星系，并确认它是一个透镜。我们展示了使用空间分辨率从theGaiamission选择镜头，并列出其他系统从WISE-Gaia-ATLAS搜索，产生三个额外的镜头（02 h35 m274 - 24 d33 m132，02 h59 m33 s-23 d38 m018，01 h46 m329 - 11 d33 m390）。整个样本由11个晶状体/NIQ组成，加上2016年之前已知的3个晶状体，覆盖ATLAS-DR 3足迹（3500 deg 2）。最后，我们讨论了对/NIQ/污染物光谱的客观分类的未来前景。
We report on discovery results from a quasar lens search in the ATLAS-DR3 public footprint. Spectroscopic follow-up campaigns, conducted at the 2.6 m Nordic Optical Telescope (La Palma) and 3.6 m New Technology Telescope (La Silla) in 2016, yielded seven pairs of quasars exhibiting the same lines at the same redshift and monotonic flux ratios with wavelength (hereafter NIQs, nearly identical quasar pairs). Magellan spectra of A0140−1152 (01h40m030–11d52m190,zs= 1.807) confirm it as a lens with deflector atzl= 0.277 and Einstein radius θE= (0.73 ± 0.02) arcsec. Follow-up imaging of the NIQ A2213−2652 (22h13m384–26d52m271) reveals the deflector galaxy and confirms it as a lens. We show the use of spatial resolution from theGaiamission to select lenses and list additional systems from a WISE-Gaia-ATLAS search, yielding three additional lenses (02h35m274–24d33m132, 02h59m33s–23d38m018, 01h46m329–11d33m390). The overall sample consists of 11 lenses/NIQs, plus three lenses known before 2016, over the ATLAS-DR3 footprint (≈3500 deg2). Finally, we discuss future prospects for objective classification of pair/NIQ/contaminant spectra.