Pith Number

pith:P2KFTGDK

pith:2016:P2KFTGDKSAEKWCDSSA74LHQL2C

not attested not anchored not stored refs pending

Spectroscopic Indication for a Centi-parsec Supermassive Black Hole Binary in the Galactic Center of NGC 5548

Chen Hu, Jian-Min Wang, Jie Qiu, Jin-Ming Bai, Kai Wang, Kai-Xing Lu, Luis C. Ho, Pu Du, Yan-Rong Li, Ying-Ke Huang, Zhi-Xiang Zhang

arxiv:1602.05005 v2 · 2016-02-16 · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P2KFTGDKSAEKWCDSSA74LHQL2C}

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	2026-05-18T01:15:42.424102Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e9459986a9008ab0872903fc59e0bd0b950db89f9e69bf2911e275810104ce6

Aliases

arxiv: 1602.05005 · arxiv_version: 1602.05005v2 · doi: 10.48550/arxiv.1602.05005 · pith_short_12: P2KFTGDKSAEK · pith_short_16: P2KFTGDKSAEKWCDS · pith_short_8: P2KFTGDK

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/P2KFTGDKSAEKWCDSSA74LHQL2C \
  | 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: 7e9459986a9008ab0872903fc59e0bd0b950db89f9e69bf2911e275810104ce6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9fc6ec8298df95de923c925e7a96abfc0baee7dd4266f3d0218615fe9577a7d",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-02-16T12:52:47Z",
    "title_canon_sha256": "0501ed5f4e656423e15d07506200b3cf8611f29d0ab191b8db65dac728623ab7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.05005",
    "kind": "arxiv",
    "version": 2
  }
}