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  • 标题:The effects of varying depth in cosmic shear surveys
  • 本地全文:下载
  • 作者:Sven Heydenreich ; Peter Schneider ; Hendrik Hildebrandt
  • 期刊名称:Astronomy & Astrophysics
  • 印刷版ISSN:0004-6361
  • 电子版ISSN:1432-0746
  • 出版年度:2020
  • 卷号:634
  • 页码:1-16
  • DOI:10.1051/0004-6361/201936966
  • 语种:English
  • 出版社:EDP Sciences
  • 摘要:We present a semi-analytic model for the shear two-point correlation function of a cosmic shear survey with non-uniform depth. Ground-based surveys are subject to depth variations that primarily arise through varying atmospheric conditions. For a survey like the Kilo-Degree Survey (KiDS), we find that the measured depth variation increases the amplitude of the observed shear correlation function at the level of a few percent out to degree-scales, relative to the assumed uniform-depth case. The impact on the inferred cosmological parameters is shown to be insignificant for a KiDS-like survey. For next-generation cosmic shear experiments, however, we conclude that variable depth should be accounted for.
  • 关键词:engravitational lensing: weakcosmology: miscellaneous
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