Pith Number

pith:O4V4EHSC

pith:2010:O4V4EHSCZCF2E4LQMWLIHV7F35

not attested not anchored not stored refs pending

Cyg OB2 #5: When three stars are just not enough

A. Fink, M. Kennedy, P.M. Williams, S.M. Dougherty

arxiv:1011.0777 v1 · 2010-11-03 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O4V4EHSCZCF2E4LQMWLIHV7F35}

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	2026-05-18T04:37:12.385972Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

772bc21e42c88ba27170659683d7e5df7642c6f0d832eb71691078e4709a0fbc

Aliases

arxiv: 1011.0777 · arxiv_version: 1011.0777v1 · doi: 10.48550/arxiv.1011.0777 · pith_short_12: O4V4EHSCZCF2 · pith_short_16: O4V4EHSCZCF2E4LQ · pith_short_8: O4V4EHSC

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/O4V4EHSCZCF2E4LQMWLIHV7F35 \
  | 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: 772bc21e42c88ba27170659683d7e5df7642c6f0d832eb71691078e4709a0fbc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c56eea10a6c3e52914410396f7439e6cc2dd0b6f9e2ac897bfb022e3aff6c420",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-11-03T00:16:18Z",
    "title_canon_sha256": "9328e9314bea67a9d52e1be29a52c15f0ab14e4855d22ca771d6004b6a399803"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.0777",
    "kind": "arxiv",
    "version": 1
  }
}