暗能量巡天第三年结果：点扩散函数建模
天体物理仪器与方法
2022-02-21 v2 宇宙学与河外天体物理
摘要
我们介绍了一个用于天文图像点扩散函数（PSF）建模的新软件包，称为 Piff（PSFs In the Full FOV，全视场 PSF），并将其应用于暗能量巡天（DES）前三年的数据（即 Y3）。我们描述了 Piff 用于 PSF 建模的相关算法细节，包括 PSF 模型如何随视场（FOV）变化。诊断结果表明，在 DES Y3 弱透镜分析重要的尺度范围内，PSF 建模的系统误差非常小。特别是，PSF 建模的系统误差显著小于 DES 第一年（Y1）分析的相应结果。我们还简要描述了一些计划中对 Piff 的改进，预期能在未来分析中进一步降低建模误差。
引用
@article{arxiv.2011.03409,
title = {Dark Energy Survey Year 3 Results: Point-Spread Function Modeling},
author = {M. Jarvis and G. M. Bernstein and A. Amon and C. Davis and P. F. Léget and K. Bechtol and I. Harrison and M. Gatti and A. Roodman and C. Chang and R. Chen and A. Choi and S. Desai and A. Drlica-Wagner and D. Gruen and R. A. Gruendl and A. Hernandez and N. MacCrann and J. Meyers and A. Navarro-Alsina and S. Pandey and A. A. Plazas and L. F. Secco and E. Sheldon and M. A. Troxel and S. Vorperian and K. Wei and J. Zuntz and T. M. C. Abbott and M. Aguena and S. Allam and S. Avila and S. Bhargava and S. L. Bridle and D. Brooks and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and M. Costanzi and L. N. da Costa and J. De Vicente and H. T. Diehl and P. Doel and S. Everett and B. Flaugher and P. Fosalba and J. Frieman and J. García-Bellido and E. Gaztanaga and D. W. Gerdes and G. Gutierrez and S. R. Hinton and D. L. Hollowood and K. Honscheid and D. J. James and S. Kent and K. Kuehn and N. Kuropatkin and O. Lahav and M. A. G. Maia and M. March and J. L. Marshall and P. Melchior and F. Menanteau and R. Miquel and R. L. C. Ogando and F. Paz-Chinchón and E. S. Rykoff and E. Sanchez and V. Scarpine and M. Schubnell and S. Serrano and I. Sevilla-Noarbe and M. Smith and E. Suchyta and M. E. C. Swanson and G. Tarle and T. N. Varga and A. R. Walker and W. Wester and R. D. Wilkinson and DES Collaboration},
journal= {arXiv preprint arXiv:2011.03409},
year = {2022}
}
备注
19 pages, accepted/published by MNRAS. See https://www.darkenergysurvey.org/des-year-3-cosmology-results-papers/ for the full DES Y3 cosmology release