Magnification Bias in Gravitational Arc Statistics

Understand

The statistics of gravitational arcs in galaxy clusters is a powerful probe of cluster structure and may provide complementary cosmological constraints.

• Despite recent progresses, discrepancies still remain among modelling and observations of arc abundance, specially regarding the redshift distribution of strong lensing clusters.
• Besides, fast "semi-analytic" methods still have to incorporate the success obtained with simulations.
• In this paper we discuss the contribution of the magnification in gravitational arc statistics.