Combining Weak Lensing Tomography with Halo Clustering to Probe Dark Energy

Understand

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.