Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A proposal on the galaxy intrinsic alignment self-calibration in weak
  lensing surveys   The galaxy intrinsic alignment causes the galaxy ellipticity-ellipticity
power spectrum between two photometric redshifts to decrease faster with
respect to the redshift separation $\Delta z^P$, for fixed mean redshift. This
offers a valuable diagnosis on the intrinsic alignment. We show that the
distinctive dependences of the GG, II and GI correlations on $\Delta z^P$ over
the range $|\Delta z^P|\la 0.2$ can be understood robustly without strong
assumptions on the intrinsic alignment. This allows us to measure the intrinsic
alignment within each conventional photo-z bin of typical size $\ga 0.2$,
through lensing tomography of photo-z bin size $\sim 0.01$. Both the
statistical and systematical errors in the lensing cosmology can be reduced by
this self-calibration technique.

27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga