Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Combining Weak Lensing Tomography with Halo Clustering to Probe Dark
  Energy   Two methods of constraining the properties of dark energy are weak lensing
tomography and cluster counting. Uncertainties in mass calibration of clusters
can be reduced by using the properties of halo clustering (the clustering of
clusters). However, within a single survey, weak lensing and halo clustering
probe the same density fluctuations. We explore the question of whether this
information can be used twice -- once in weak lensing and then again in halo
clustering to calibrate cluster masses -- or whether the combined dark energy
constraints are weaker than the sum of the individual constraints. For a survey
like the Dark Energy Survey (DES), we find that the cosmic shearing of source
galaxies at high redshifts is indeed highly correlated with halo clustering at
lower redshifts. Surprisingly, this correlation does not degrade cosmological
constraints for a DES-like survey, and in fact, constraints are marginally
improved since the correlations themselves act as additional observables. This
considerably simplifies the analysis for a DES-like survey: when weak lensing
and halo clustering are treated as independent experiments, the combined dark
energy constraints (cluster counts included) are accurate if not slightly
conservative. Our findings mirror those of Takada and Bridle, who investigated
correlations between the cosmic shear and cluster counts.

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The categories of this paper are: econ
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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: cs
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin