Pith Number

pith:PNNUPCK2

pith:2009:PNNUPCK22D3HYZFZFCR4EUGUHK

not attested not anchored not stored refs pending

On the velocity dispersion of young star clusters: super-virial or binaries?

2), (2) Amsterdam, (3) Leiden), H. Sana (1, M. Gieles (1), S.F. Portegies Zwart (3) ((1) ESO

arxiv:0911.1557 v1 · 2009-11-08 · astro-ph.SR · 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{PNNUPCK22D3HYZFZFCR4EUGUHK}

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	2026-05-18T02:10:58.139362Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b5b47895ad0f67c64b928a3c250d43a828f79c777fe7fe6530e05f629d33fff

Aliases

arxiv: 0911.1557 · arxiv_version: 0911.1557v1 · doi: 10.48550/arxiv.0911.1557 · pith_short_12: PNNUPCK22D3H · pith_short_16: PNNUPCK22D3HYZFZ · pith_short_8: PNNUPCK2

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/PNNUPCK22D3HYZFZFCR4EUGUHK \
  | 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: 7b5b47895ad0f67c64b928a3c250d43a828f79c777fe7fe6530e05f629d33fff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "188048f73af895a5b13bc53e7b8bda9ae64740e0dbeb81c1a0d03dd2bbc7101e",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-11-08T21:02:21Z",
    "title_canon_sha256": "e7a920087a861026e9ac6c0317af16c3a3ba09ef098480c642b77da798cfb49f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.1557",
    "kind": "arxiv",
    "version": 1
  }
}