Pith Number

pith:5ZXKH6YL

pith:2023:5ZXKH6YLCE2NWZ7XK7ND7VF5QJ

not attested not anchored not stored refs pending

Searching for the nano-Hertz stochastic gravitational wave background with the Chinese Pulsar Timing Array Data Release I

Bojun Wang, Chun Sun, Heng Xu, Jiangwei Xu, Jianping Yuan, Jinchen Jiang, Jingbo Wang, Jingtao Luo, Jinlin Han, Kejia Lee, Lei Qian, Longfei Hao, Menglin Huang, Min Wang, Na Wang, Peng Jiang, Renxin Xu, Richard Manchester, R. Nicolas Caballero, Siyuan Chen, Xiangping Wu, Xin Guan, Yanjun Guo, Yan Zhu, Yonghua Xu, Zhiqiang Shen, Zihan Xue

Chinese pulsar timing observations detect a correlated signal consistent with a nano-Hertz stochastic gravitational wave background.

arxiv:2306.16216 v1 · 2023-06-28 · astro-ph.HE · astro-ph.CO · astro-ph.GA · astro-ph.SR · gr-qc

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\usepackage{pith}
\pithnumber{5ZXKH6YLCE2NWZ7XK7ND7VF5QJ}

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Record completeness

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

We report the key results of our statistical inference finding a correlated signal with amplitude log A_c = -14.4^{+1.0}_{-2.8} for spectral index in the range of alpha in [-1.8, 1.5] assuming a GW background induced quadrupolar correlation... a 4.6-sigma statistical significance is achieved using the discrete frequency method around the frequency of 14 nHz.

C2weakest assumption

The observed correlations are produced by a stochastic gravitational wave background with the standard quadrupolar (Hellings-Downs) spatial pattern rather than by unmodeled pulsar noise, clock errors, or other systematics that could mimic the signal.

C3one line summary

CPTA DR1 data yields a GWB-like correlated signal with fitted amplitude log A_c = -14.4 and 4.6-sigma support for Hellings-Downs quadrupolar correlations at 14 nHz.

Cited by

93 papers in Pith

A new framework for lightning-fast gravitational wave analysis of pulsar timing data

From inflation to hot big bang -- a tutorial on cosmological perturbations

Population statistics of nanohertz gravitational wave sources

Nanohertz gravitational waves from domain walls nucleated during inflation

Constant-Roll Inflation: Analytical Formulae for Power Spectrum and Implications for Induced Gravitational Waves

Receipt and verification

First computed	2026-07-05T06:25:50.982304Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ee6ea3fb0b1134db67f757da3fd4bd825cb66d20763e4709569e76400e46ade4

Aliases

arxiv: 2306.16216 · arxiv_version: 2306.16216v1 · doi: 10.48550/arxiv.2306.16216 · pith_short_12: 5ZXKH6YLCE2N · pith_short_16: 5ZXKH6YLCE2NWZ7X · pith_short_8: 5ZXKH6YL

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/5ZXKH6YLCE2NWZ7XK7ND7VF5QJ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: ee6ea3fb0b1134db67f757da3fd4bd825cb66d20763e4709569e76400e46ade4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52c06f870174c1675f1db570a19b65bdab370c444d5a79ddd4d6a1901c1c3de1",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA",
      "astro-ph.SR",
      "gr-qc"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2023-06-28T13:51:04Z",
    "title_canon_sha256": "bc9b2e6256aed9f6392b4988e0081cb75ea5e95f625f501d0536ea5db95a5b29"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2306.16216",
    "kind": "arxiv",
    "version": 1
  }
}