Pith Number

pith:4FGSZ3UQ

pith:2023:4FGSZ3UQOEKXTIXK7ED5Z4234T

not attested not anchored not stored refs pending

Observational Evidence of a Centi-parsec Supermassive Black Hole Binary Existing in the Nearby Galaxy M81

Fuguo Xie, Ivan Mart\'i-Vidal, Lei Huang, Noriyuki Kawaguchi, Roman Gold, Wu Jiang, Ya-Ping Li, Zhen Yan, Zhiqiang Shen

arxiv:2312.01328 v1 · 2023-12-03 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4FGSZ3UQOEKXTIXK7ED5Z4234T}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

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.

Receipt and verification

First computed	2026-07-05T07:19:33.405450Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e14d2cee90711579a2eaf907dcf35be4ffe8a23249ff6024cc081a8ecc79d53e

Aliases

arxiv: 2312.01328 · arxiv_version: 2312.01328v1 · doi: 10.48550/arxiv.2312.01328 · pith_short_12: 4FGSZ3UQOEKX · pith_short_16: 4FGSZ3UQOEKXTIXK · pith_short_8: 4FGSZ3UQ

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/4FGSZ3UQOEKXTIXK7ED5Z4234T \
  | 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: e14d2cee90711579a2eaf907dcf35be4ffe8a23249ff6024cc081a8ecc79d53e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b441a15febf4b8f80bee258e1f50bb1f3da0c94f62b9add8acc8de482587792e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2023-12-03T09:25:43Z",
    "title_canon_sha256": "70d77b770a5084eb2f956cbbfe25fba1d3f26d61fea79454ea526b69ba65862a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2312.01328",
    "kind": "arxiv",
    "version": 1
  }
}