Pith Number

pith:NDD25OCS

pith:2018:NDD25OCSWLHEUUARGBAIP7ZWYP

not attested not anchored not stored refs pending

Gravitational wave detection from OJ 287 via a pulsar timing array

Jie-Wen Chen, Yang Zhang

arxiv:1809.09473 v1 · 2018-09-25 · gr-qc · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NDD25OCSWLHEUUARGBAIP7ZWYP}

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	2026-05-18T00:04:51.136417Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68c7aeb852b2ce4a5011304087ff36c3d5653e2b98436aad7e97da4e67ffff20

Aliases

arxiv: 1809.09473 · arxiv_version: 1809.09473v1 · doi: 10.48550/arxiv.1809.09473 · pith_short_12: NDD25OCSWLHE · pith_short_16: NDD25OCSWLHEUUAR · pith_short_8: NDD25OCS

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/NDD25OCSWLHEUUARGBAIP7ZWYP \
  | 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: 68c7aeb852b2ce4a5011304087ff36c3d5653e2b98436aad7e97da4e67ffff20

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9617182f3792d97d08794050aa6d8e535611831c2fe13807723069a875ae401d",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-09-25T13:36:23Z",
    "title_canon_sha256": "a25ecff2019a9e663e3b2d9ac0f32c917396b30782b65481c4d8210be069f767"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.09473",
    "kind": "arxiv",
    "version": 1
  }
}