Pith Number

pith:6VHE3D3F

pith:2009:6VHE3D3F2CP6THJUXEVJMFGW7Z

not attested not anchored not stored refs pending

The bottom of the white dwarf cooling sequence in the old open cluster NGC 2158

(2) J.M.Univ.Liverpool, (3) Univ.of Washington Seattle, (4) Univ.PD, (5) INAF-Obs.Teramo), G. Piotto (4), I. R. King (3), J. Anderson (1), L. R. Bedin (1), M. Salaris (2), S. Cassisi (5) ((1) STScI

arxiv:0912.0257 v1 · 2009-12-01 · astro-ph.GA · 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{6VHE3D3F2CP6THJUXEVJMFGW7Z}

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	2026-05-18T02:10:34.990719Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f54e4d8f65d09fe99d34b92a9614d6fe4fb7abd34022b38821048a2f88221039

Aliases

arxiv: 0912.0257 · arxiv_version: 0912.0257v1 · doi: 10.48550/arxiv.0912.0257 · pith_short_12: 6VHE3D3F2CP6 · pith_short_16: 6VHE3D3F2CP6THJU · pith_short_8: 6VHE3D3F

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/6VHE3D3F2CP6THJUXEVJMFGW7Z \
  | 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: f54e4d8f65d09fe99d34b92a9614d6fe4fb7abd34022b38821048a2f88221039

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "673ba65c21037a50885b254ae87d15b7e72aedb9e51d42dc733d5d44d77fdff9",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-12-01T21:00:00Z",
    "title_canon_sha256": "5c48d4cc7ad1f1ec9399351d2491e30513a08affe3508bc571925e9ec6aa7d14"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0257",
    "kind": "arxiv",
    "version": 1
  }
}