The three-year shear catalog of the Subaru Hyper Suprime-Cam SSP Survey
The three-year shear catalog of the Subaru Hyper Suprime-Cam SSP Survey
复制标题
Subaru Hyper Suprime-Cam SSP 测量的三年剪切目录
DOI：
10.1093/pasj/psac006
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发表时间：
2022
影响因子：
2.3
通讯作者：
Strauss Mich
中科院分区：
文献类型：
--
作者：
Li Xiangchong;Miyatake Hironao;Luo Wentao;More Surhud;Oguri Masamune;Hamana Takashi;Mandelbaum Rachel;Shirasaki Masato;Takada Masahiro;Armstrong Robert;Kannawadi Arun;Takita Satoshi;Miyazaki Satoshi;Nishizawa Atsushi J;Plazas Malagon Andres A;Strauss Mich
我们提出的星系剪切目录，将用于为期三年的宇宙学弱引力透镜分析使用的超Suprime-Cam（HSC）斯巴鲁战略计划（SSP）调查的宽层的数据。星系形状是从2014年至2019年获得的i波段成像数据中测量的，并使用图像模拟进行校准，这些图像模拟类似于COSMOS地区哈勃太空望远镜的训练星系图像。该星表覆盖了北方天空433.48度2的区域，分为六个区域。我的意思是，我的视线。根据保守的星系选择标准（例如，i波段亮度大于24.5），观测到的原始星系数密度为22.9弧分-2，有效星系数密度为19.9弧分-2。校准消除了星系属性相关的剪切估计偏差的水平|δm| < 9 × 10−3。在0 <z≤ 3范围内，偏置残差δ m与红移无关.我们定义了这个剪切目录的宇宙学弱透镜科学的要求，并量化潜在的系统分类在目录中使用一系列的内部零测试系统相关的点扩散函数建模和剪切估计。各种各样的零测试是统计一致的零或要求内，但（i）有证据的PSF模型形状的残差相关性;和（ii）恒星星系形状的相关性揭示添加剂系统。这两种效应在>1°的尺度上都变得显著，需要在利用宇宙剪切测量推断宇宙学参数时加以缓解。
We present the galaxy shear catalog that will be used for the three-year cosmological weak gravitational lensing analyses using data from the Wide layer of the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) Survey. The galaxy shapes are measured from thei-band imaging data acquired from 2014 to 2019 and calibrated with image simulations that resemble the observing conditions of the survey based on training galaxy images from the Hubble Space Telescope in the COSMOS region. The catalog covers an area of 433.48 deg2of the northern sky, split into six fields. The meani-band seeing is. With conservative galaxy selection criteria (e.g.,i-band magnitude brighter than 24.5), the observed raw galaxy number density is 22.9 arcmin−2, and the effective galaxy number density is 19.9 arcmin−2. The calibration removes the galaxy property-dependent shear estimation bias to the level |δm| < 9 × 10−3. The bias residual δmshows no dependence on redshift in the range 0 <z≤ 3. We define the requirements for cosmological weak-lensing science for this shear catalog, and quantify potential systematics in the catalog using a series of internal null tests for systematics related to point-spread function modelling and shear estimation. A variety of the null tests are statistically consistent with zero or within requirements, but (i) there is evidence for PSF model shape residual correlations; and (ii) star–galaxy shape correlations reveal additive systematics. Both effects become significant on >1° scales and will require mitigation during the inference of cosmological parameters using cosmic shear measurements.