Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large scale systematic signals in weak lensing surveys   We use numerical simulations to model the effect of seeing and extinction
modulations on weak lensing surveys. We find that systematic fluctuations in
the shear amplitude and source depth can give rise to changes in the $E$-mode
signal and to varying amplitudes of large scale $B$-modes. Exquisite control of
such systematics will be required as we approach the era of precision cosmology
with weak lensing.

34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol