The description of the abundance and clustering of halos for non-Gaussian initial conditions has recently received renewed interest , motivated by the forthcoming large galaxy and cluster surveys , which can potentially yield constraints of order unity on the non-Gaussianity parameter f _ { NL } .
We present tests on N-body simulations of analytical formulae describing the halo abundance and clustering for non-Gaussian initial conditions .
We calibrate the analytic non-Gaussian mass function of Matarrese et al .
( 30 ) and LoVerde et al .
( 27 ) and the analytic description of clustering of halos for non-Gaussian initial conditions on N-body simulations .
We find excellent agreement between the simulations and the analytic predictions if we make the corrections \delta _ { c } \longrightarrow \delta _ { c } \times \sqrt { q } and \delta _ { c } \longrightarrow \delta _ { c } \times q where q \simeq 0.75 , in the density threshold for gravitational collapse and in the non-Gaussian fractional correction to the halo bias , respectively .
We discuss the implications of this correction on present and forecasted primordial non-Gaussianity constraints .
We confirm that the non-Gaussian halo bias offers a robust and highly competitive test of primordial non-Gaussianity .