Monte Carlo realizations for "Anisotropies in the PTA gravitational wave background: what can they teach us about supermassive black hole binaries?"

Monte Carlo realizations underlying Zaldarriaga & Sato-Polito (2026). Seven arrays, 15.6 GB. sampled_power_anisotropy_eps{020,038,066}.npz — 10,000 realizations over 44 frequency bins at NSIDE = 8, for M–sigma scatter eps = 0.20, 0.38, 0.66. Each stores the realization-level total power Q, the full second moment S2, N_eff = Q^2/S2, the direct dipole vector, and a brightest-source ledger completed by a positive compound-Poisson remainder. sampled_population_analysis_eps{020,038,066}.npz — compact population products derived bitwise from the same power realizations, with no second random draw. sampled_c1c0_distribution_eps066.npz — the dipole-distribution product used for the corresponding figure. Every file records its own provenance: seed 42, schema pta_anisotropy.sampled_full_moment version 2, target amplitude h_c = 2.5e-15 at f = 1/yr, and the ledger completeness target. The code that produced them, the exact command lines, the SHA-256 of every file and the reference platform are in the companion repository. Regenerating from the seeds gives statistically identical but not necessarily byte-identical arrays; these are the files the paper used.