Pith Number

pith:KOIOGR5Z

pith:2009:KOIOGR5ZIYD7W2L5QYWS4PQJTF

not attested not anchored not stored refs pending

Measurement of hyperfine structure and isotope shifts in the Dy 421-nm transition

A Cing\"oz, D. Budker, N. Leefer

arxiv:0904.1438 v2 · 2009-04-09 · physics.atom-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KOIOGR5ZIYD7W2L5QYWS4PQJTF}

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	2026-05-18T02:14:06.801883Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5390e347b94607fb697d862d2e3e099963c5dd3f9ab7fe294f56633839df14f7

Aliases

arxiv: 0904.1438 · arxiv_version: 0904.1438v2 · doi: 10.48550/arxiv.0904.1438 · pith_short_12: KOIOGR5ZIYD7 · pith_short_16: KOIOGR5ZIYD7W2L5 · pith_short_8: KOIOGR5Z

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/KOIOGR5ZIYD7W2L5QYWS4PQJTF \
  | 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: 5390e347b94607fb697d862d2e3e099963c5dd3f9ab7fe294f56633839df14f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f3e433165db7b3b52c1584e978149bb70f9affd8a63d43f431c7da0b5a326e76",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2009-04-09T19:59:00Z",
    "title_canon_sha256": "7f9e68a11aef618ab836175cea03d8d51e477db6f1321101d7050e22dade0a92"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.1438",
    "kind": "arxiv",
    "version": 2
  }
}