Multi-messenger cross-correlation analysis combining Gaia DR3 kinematic stellar halo maps (pm > 12 mas/yr), the Totani (2025) Fermi LAT gamma-ray residual maps, and the Haslam 408 MHz synchrotron emission. Analysis performed in a ring ROI (20° 0: γ×kinematics 3. 0σ, γ×synchrotron 3. 6σ, synchrotron×kinematics 2. 4σ— Frozen pipeline (parameters fixed before data inspection, scramble null): 6. 1σ after look-elsewhere correction— Spectral analysis across 9 energy bins (1. 5–170 GeV, live fort-file computation): χ²/dof = 1. 91 for WIMP 600 GeV bb-bar vs 18–22 for ICS, MSP, null— Bayes factor B (WIMP/null) = 2×10³⁴ for spectral shape— Spectral unmixing (NNLS): DM = 100%; χ²ₙo-DM = 21. 5— MSP excluded by three zero-signal bins (1. 5/2. 5/4. 3 GeV), Ring/Bulge = 15×, zero ATNF pulsars in ROI— Main systematic: GALPROP background model (−59% to +12%) — P (DM) = 0. 70 (subjective estimate) This is multi-messenger evidence at 3σ; not a 5σ detection. Files included: — totani₆4. npy: Totani (2025) 21 GeV Fermi LAT residual map, HEALPix NSIDE=64— gaiaₘapᵥeryₛtrict. npy: Gaia DR3 pm>12 kinematic halo map— analysisₐrrays. npz: ROI indices, ring mask, Galactic coordinates— jfactorₘaps. npy: J-factor profiles (NFW, Einasto, Burkert, Isothermal) — haslamconfounderₜest. npy: Haslam 408 MHz confounder test results— proofL2LIVE. npy: Spectral analysis results (live computation from fort files) — amberᵣesolutionfinal. npy: Full consilium audit results (25 agents, 8 amber items) — amserdmₕaloᵥ5. 0. docx: Research note v5. 0 GitHub: https: //github. com/olwynamser/dm-halo-cross-correlationContact: olwynamser@gmail. com v4. 0 → v5. 0 changes: added live spectral analysis (9 bins), consilium audit (25 agents), look-elsewhere correction, GALPROP chi²/dof robustness, ATNF completeness caveat, GSE contamination discussion, AI disclosure.
Olwyn Amser (Mon,) studied this question.