Heydenreich, S;
Schneider, P;
Hildebrandt, H;
Asgari, M;
Heymans, C;
Joachimi, B;
Kuijken, K;
... Van den Busch, JL; + view all
(2019)
The effects of varying depth in cosmic shear surveys.
Astronomy & Astrophysics
10.1051/0004-6361/201936966.
(In press).
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Abstract
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.
| Type: | Article |
|---|---|
| Title: | The effects of varying depth in cosmic shear surveys |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1051/0004-6361/201936966 |
| Publisher version: | https://doi.org/10.1051/0004-6361/201936966 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | gravitational lensing: weak – cosmology: miscellaneous |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10089010 |
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