暗能量巡天第二次数据发布
天体物理仪器与方法
2021-10-22 v3 宇宙学与河外天体物理
星系天体物理
太阳与恒星天体物理
摘要
我们呈现了暗能量巡天（DES DR2）的第二次公开数据发布，其基于安装在智利托洛洛山美洲际天文台 4 米 Blanco 望远镜上的暗能量相机所拍摄的光学/近红外成像。DES DR2 由还原的单历元与叠加图像、源自叠加图像的源星表，以及由 6 年 DES 科学运行组装的关联数据产品构成。本次发布包含 DES 广域巡天数据，覆盖南银冠约 5000 deg 的五个宽波段测光带 grizY。DES DR2 的中值交付点扩散函数半高全宽为 g=1.11、r=0.95、i=0.88、z=0.83 和 Y=0.90 角秒；相对于 Gaia DR2 G 带的测光均匀性标准偏差 <3 mmag，测光精度约 10 mmag，中值内部天体测量精度约 27 mas。在 S/N=10 下直径 1.95 角秒孔径的中值叠加星表深度为 g=24.7、r=24.4、i=23.8、z=23.1 和 Y=21.7 mag。DES DR2 包含从 76,217 张单历元图像生成的 10,169 个尺寸 0.534 deg 的叠加图像块中探测到的约 6.91 亿个不同天体。经基本质量筛选后，基准星系与恒星样本分别包含 5.43 亿和 1.45 亿个天体。这些数据可通过若干接口访问，包括交互式图像可视化工具、基于网络的查询客户端、图像截切服务器与 Jupyter notebooks。DES DR2 是迄今在所达深度与测光精度下最大的测光数据集。
引用
@article{arxiv.2101.05765,
title = {The Dark Energy Survey Data Release 2},
author = {DES Collaboration and T. M. C. Abbott and M. Adamow and M. Aguena and S. Allam and A. Amon and J. Annis and S. Avila and D. Bacon and M. Banerji and K. Bechtol and M. R. Becker and G. M. Bernstein and E. Bertin and S. Bhargava and S. L. Bridle and D. Brooks and D. L. Burke and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and F. J. Castander and R. Cawthon and C. Chang and A. Choi and C. Conselice and M. Costanzi and M. Crocce and L. N. da Costa and T. M. Davis and J. De Vicente and J. DeRose and S. Desai and H. T. Diehl and J. P. Dietrich and A. Drlica-Wagner and K. Eckert and J. Elvin-Poole and S. Everett and A. E. Evrard and I. Ferrero and A. Ferté and B. Flaugher and P. Fosalba and D. Friedel and J. Frieman and J. García-Bellido and L. Gelman and D. W. Gerdes and T. Giannantonio and M. Gill and D. Gruen and R. A. Gruendl and J. Gschwend and G. Gutierrez and W. G. Hartley and S. R. Hinton and D. L. Hollowood and K. Honscheid and D. Huterer and D. J. James and T. Jeltema and M. D. Johnson and S. Kent and R. Kron and K. Kuehn and N. Kuropatkin and O. Lahav and T. S. Li and C. Lidman and H. Lin and N. MacCrann and M. A. G. Maia and T. Manning and M. March and J. L. Marshall and P. Martini and P. Melchior and F. Menanteau and R. Miquel and R. Morgan and J. Myles and E. Neilsen and R. L. C. Ogando and A. Palmese and F. Paz-Chinchón and D. Petravick and A. Pieres and A. A. Plazas and C. Pond and M. Rodriguez-Monroy and A. K. Romer and A. Roodman and E. S. Rykoff and M. Sako and E. Sanchez and B. Santiago and S. Serrano and I. Sevilla-Noarbe and J. Allyn. Smith and M. Smith and M. Soares-Santos and E. Suchyta and M. E. C. Swanson and G. Tarle and D. Thomas and C. To and P. E. Tremblay and M. A. Troxel and D. L. Tucker and D. J Turner and T. N. Varga and A. R. Walker and R. H. Wechsler and J. Weller and W. Wester and R. D. Wilkinson and B. Yanny and Y. Zhang and R. Nikutta and M. Fitzpatrick and A. Jacques and A. Scott and K. Olsen and L. Huang and D. Herrera and S. Juneau and D. Nidever and B. A. Weaver and C. Adean and V. Correia and M. de Freitas and F. N. Freitas and C. Singulani and G. Vila-Verde},
journal= {arXiv preprint arXiv:2101.05765},
year = {2021}
}
备注
Accepted version. Copyright AAS. Reproduced with permission. 29 pages, 13 figures. Visit https://des.ncsa.illinois.edu/releases/dr2