Beyond-2pt parameter masked data challenge

This data challenge for analyses of galaxy redshift surveys consists of galaxy mock catalogs constructed from N-body halo catalogs using HOD-based galaxy assignments. The aim of this challenge is to provide a benchmark data set for emerging statistics and analysis technique and we welcome new submissions anytime.

An initial set of results is presented in 2405.02252, with submissions from

hybrid-EFT power spectrum analysis with the "BACCO" emulator ("BACCO" P),
effective field theory-based field-level Bayesian inference (EFT FBI),
joint power spectrum plus bispectrum analysis using effective field theory (EFT P+B),
density-split clustering (DSC),
two different flavors of k-nearest neighbor statistics (kNN),
a simulation-based-inference analysis of the power spectrum plus bispectrum (SBI P+B),
void-galaxy correlation function (VGCF),
void size function (VSF).

The simulated galaxy catalogs are available in three different coordinate systems with increasing analysis complexity:

Flat LCDM catalogs

Real-space snapshot

Ten realizations of one LCDM cosmology with real-space galaxy coordinates from a 8,0 (Gpc/h)^3 snapshot at z=1.0 with periodic boundary conditions (box length = 2000.0 Mpc/h). For each galaxy, the file contains coordinates x,y,z in Mpc/h with the box center at (1000,1000,1000). The galaxy number density is ~ 4.5e-4 (Mpc/h)^{-3}.

Redshift-space snapshot

Ten realizations of one LCDM cosmology with redshift-space galaxy coordinates for a line-of-sight along the z coordinate axis with redshift space distortions calculated in the plane-parallel approximation from a 8.0 (Gpc/h)^3 snapshot at z=1.0 with periodic boundary conditions (box length = 2000.0 Mpc/h). For each galaxy, the file contains x,y,z_los in Mpc/h with the box center at (1000,1000,1000). The galaxy number density is ~ 4.5e-4 (Mpc/h)^{-3}.

Light cone (mock_lcdm_lightcone.h5)

One LCDM lightcone with angular coordinates RA,DEC and redshift Z_red for a galaxy sample in the redshift range [0.8,1.3]. The survey footprint is 0.0^◦ < RA < 90.0^◦ and -46^◦ < DEC < 0^◦, with uniform coverage across the redshift range. The galaxy number density at z = 1 is ~ 4.5e-4 (Mpc/h)^-3.

The fiducial cosmolgies fo the mocks are drawn from the prior specified in this script. A minimal example for reading in the catalogs is provided here.

Issues and Questions