Resonant Hunter v9.0 – Ultra-High-Resolution Scan of the 190–250 Hz Coherent Band (Execution in Progress)

Authors: Miguel Ángel Percudani Description: This Zenodo record accompanies the ongoing execution of the Resonant Hunter v9.0 code, designed to perform an ultra‑high‑resolution frequency scan (step 0.01 Hz) across the persistent coherent band (190–250 Hz) previously identified in LIGO O4a data. The analysis is being carried out on the public strain files H-H1_GWOSC_O4a_16KHZ_R1-1389416448-4096.hdf5 and L-L1_GWOSC_O4a_16KHZ_R1-1389416448-4096.hdf5 (GPS start 1389416448). The purpose of this scan is to investigate whether the band contains any unresolved substructure – such as discrete peaks, frequency modulation, or periodic variations in coherence – that could provide deeper insight into the physical origin of the signal. The code implements the rotational heterodyne method (8‑phase, 45° steps) with an ultra‑narrow bandpass filter (bandwidth 0.5 Hz). It processes all 369 independent time windows (each 11.10 s) and computes the coherence for each frequency step, generating a detailed matrix of coherence vs. window index. Current status: The execution is active and ongoing. The computational load is substantial (approx. 2.2 million coherence calculations), and results are expected to become available within the next hours. Upon completion, the output files (JSON, NumPy matrices, and plots) will be added to this record or linked from it. Interested users can monitor progress or reproduce the analysis using the source code available at 10.5281/zenodo.18446712. Related DOIs: Resonant Hunter core: 10.5281/zenodo.18446712 UAT theory: 10.5281/zenodo.17729221 UPC principle: 10.5281/zenodo.18210808 Software requirements: Python 3 with numpy, scipy, h5py, matplotlib. The code is designed to run interactively in Google Colab or any Python environment.