  We propose a real-space probe that is based on density measurements to
extract distinct signatures of quasihole-like states of bosons experiencing a
synthetic magnetic field in a two-dimensional lattice. We numerically show that
certain ratios of the mean square radii of the particle cloud, obtainable
through the density profile, approach the continuum values expected from
Laughlin's ansatz wave functions quickly as the magnetic flux quanta per unit
cell of the lattice decrease, even in a small lattice with few particles. This
method could equally be used in both ultra-cold atomic and photonic systems.
