The STRong lensing Insights into the Dark Energy Survey (STRIDES) 2016 follow-up campaign – I. Overview and classification of candidates selected by two techniques
The STRong lensing Insights into the Dark Energy Survey (STRIDES) 2016 follow-up campaign – I. Overview and classification of candidates selected by two techniques
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DOI：
10.1093/mnras/sty2329
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发表时间：
2018-08
影响因子：
4.8
通讯作者：
T. Treu;A. Agnello;M. Baumer;S. Birrer;E. Buckley-Geer;F. Courbin;Y. Kim;Huan Lin;P. Marshall-P.-Mar
中科院分区：
文献类型：
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作者：
T. Treu;A. Agnello;M. Baumer;S. Birrer;E. Buckley-Geer;F. Courbin;Y. Kim;Huan Lin;P. Marshall-P.-Mar
© 2018作者（S）。STRong Lensing Insights into the Dark Energy Survey（STRDES）合作的主要目标是测量暗能量状态方程参数和暗物质的自由流长度。为了实现这一目标，科学家们正在暗能量巡天的成像数据中发现强透镜类星体，并对其进行跟踪，以测量时间延迟、高分辨率成像和足以构建精确透镜模型的光谱学。在本文中，我们首先提出了预测的CODEDES。然后，我们描述了CFDES分类方案，并概述了2016年秋季的后续活动。我们继续详细介绍两种选择方法，离群值选择技术和形态学算法的结果，并提出一个系统，可能是一个透镜类星体在一个不寻常的配置透镜模型。我们以2016年秋季活动的汇总统计数据结束。包括在配套论文中提出的检索（Anguita等人; Ostrovski等人），天文学家追踪了117个目标，发现了7个新的强透镜系统和7个几乎相同的类星体，通过对透镜星系的探测可以证实它们是透镜。76个候选者被拒绝，27个仍然是不确定的，成功率在6- 35%的范围内，这个比率与以前的搜索，如SDSS类星体透镜搜索，即使父数据集的SDSS DES是纯粹的光度和我们的候选人的选择不能依赖于光谱信息。
© 2018 The Author(s). The primary goals of the STRong lensing Insights into the Dark Energy Survey (STRIDES) collaboration are to measure the dark energy equation of state parameter and the free streaming length of dark matter. To this aim, STRIDES is discovering strongly lensed quasars in the imaging data of the Dark Energy Survey and following them up to measure time delays, high resolution imaging, and spectroscopy sufficient to construct accurate lens models. In this paper, we first present forecasts for STRIDES. Then, we describe the STRIDES classification scheme, and give an overview of the Fall 2016 follow-up campaign. We continue by detailing the results of two selection methods, the outlier selection technique and a morphological algorithm, and presenting lens models of a system that could possibly be a lensed quasar in an unusual configuration. We conclude with the summary statistics of the Fall 2016 campaign. Including searches presented in companion papers (Anguita et al.; Ostrovski et al.), STRIDES followed up 117 targets identifying 7 new strongly lensed systems, and 7 nearly identical quasars, which could be confirmed as lenses by the detection of the lens galaxy. 76 candidates were rejected and 27 remain otherwise inconclusive, for a success rate in the range of 6-35 per cent. This rate is comparable to that of previous searches like SDSS Quasar Lens Search even though the parent data set of STRIDES is purely photometric and our selection of candidates cannot rely on spectroscopic information.