{
  "abstract": "We present sgnax, an open-source pipeline for gravitational-wave detector characterization that produces matched-filter and excess-power transient triggers within a single streaming dataflow graph. Built on the Stream Graph Navigator (sgn) framework, sgnax combines the multi-rate sine-Gaussian matched filtering of snax and the multi-resolution Q-transform of omicron in a Python-native package with shared configuration and output formats. Strain and auxiliary channels share data ingestion and whitening, reducing per-channel processing costs by a factor of 2.8 from one to 32 channels for the Q-transform. A full day of 16 kHz strain is processed in 14 minutes; four processes sharing an NVIDIA V100 analyze 792 auxiliary channels at 1.11 times real-time throughput. The same configuration supports offline and online operation through frame caches, shared memory, and the arrakis distribution service. Matched-filter triggers have approximately five seconds of end-to-end latency, while Q-transform triggers are available within tens of seconds. Injection studies recover 99.4% of recoverable sine-Gaussian signals and show broadband burst recovery consistent with established generators. On 24 hours of LIGO strain, sgnax agrees with production omicron to 0.1% in total trigger count, with per-trigger signal-to-noise ratios agreeing at the percent level across frequency bands. Auxiliary-channel comparisons recover 80% of the snax loud-feature population per time bin. The validation also reveals a multiband amplitude error in production snax that inflates reported signal-to-noise ratios below 25.6 Hz by factors of sqrt(2) to 2.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.09804",
  "author_total": 4,
  "authors": [
    {
      "name": "Zach Yarbrough"
    },
    {
      "name": "Olivia Godwin"
    },
    {
      "name": "Derek Davis"
    },
    {
      "name": "Gabriela González"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4v17r04178j02.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.09804",
  "fulltext_url": null,
  "id": "4v17r04178j02",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.09804",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.IM"
    ],
    [
      "openalex",
      "3103|Pulsars and Gravitational Waves Research"
    ]
  ],
  "openalex": "W7202180334",
  "pdf_url": "https://arxiv.org/pdf/2608.09804",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4v17r04178j02.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:22Z",
      "native_id": "2608.09804",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.09804"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    }
  ],
  "title": "Unified matched-filter and excess-power pipeline for gravitational-wave detector characterization",
  "title_text": "Unified matched-filter and excess-power pipeline for gravitational-wave detector characterization",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:44Z",
  "url": "https://research.draconitic.com/paper/4v17r04178j02",
  "venue": "arXiv",
  "versions": []
}