Code and Data for "Cross Survey Evidence for a Polar Radio Dipole"

This repository contains the full Google Colab notebook and supporting scripts used to produce all results, figures, and tables in Cross-Survey Evidence for a Polar Radio Dipole (Morton, 2025).

The analysis implements a fully reproducible counts–in–cells dipole measurement of three public radio surveys:

NVSS (1.4 GHz)

TGSS ADR1 (150 MHz)

LoTSS DR2 (144 MHz)

via live VizieR queries. It evaluates the dipole amplitude vs. the kinematic expectation as a function of flux threshold, applies jackknife errors and Poisson nulls, and reports isotropy p-values.

Key features:

Cross-survey validation across independent frequencies and footprints

Flux-sweep tests showing a smooth approach from excess dipole amplitude at faint thresholds toward the kinematic baseline at bright cuts

Mask sweeps and patchwise clustering diagnostics for systematic control

Transparent reproducibility: running the notebook regenerates Figures 1–2 and Tables 1–2 exactly as presented in the paper.

All parameters, cuts, and query settings match those in the manuscript. LoTSS DR2 provides a modern, deeper complement to the NVSS and TGSS results, demonstrating stability of the flux-dependent dipole pattern in contemporary data.