Pith Number

pith:7SX5M3DY

pith:2005:7SX5M3DYSVVEPYPT6Z6NQ7R4RG

not attested not anchored not stored refs pending

An Extremely Large Excess of 18O in the Hydrogen-Deficient Carbon Star, HD 137613

C.W. Engelbracht, Emily D. Tenenbaum, Falk Herwig, Geoffrey C. Clayton, Karl D. Gordon, Martin Asplund, T.R. Geballe

arxiv:astro-ph/0503198 v1 · 2005-03-08 · astro-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{7SX5M3DYSVVEPYPT6Z6NQ7R4RG}

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	2026-05-18T01:07:31.634085Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fcafd66c78956a47e1f3f67cd87e3c898bd2d286e2cc3f934ce711dbeb210354

Aliases

arxiv: astro-ph/0503198 · arxiv_version: astro-ph/0503198v1 · doi: 10.48550/arxiv.astro-ph/0503198 · pith_short_12: 7SX5M3DYSVVE · pith_short_16: 7SX5M3DYSVVEPYPT · pith_short_8: 7SX5M3DY

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/7SX5M3DYSVVEPYPT6Z6NQ7R4RG \
  | 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: fcafd66c78956a47e1f3f67cd87e3c898bd2d286e2cc3f934ce711dbeb210354

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25713b6515530ad7dee601bd494ee8d2872de785c19cc9f3187b2f59fdd2759e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-03-08T23:13:22Z",
    "title_canon_sha256": "77c2a95c3ad1dfb41a7a47a320161e215962bc4e0c29ba4803bea0ba295857bb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0503198",
    "kind": "arxiv",
    "version": 1
  }
}