Pith Number

pith:3M7CJUU2

pith:1999:3M7CJUU2TH7OZWW3EUMO6M7V34

not attested not anchored not stored refs pending

On the Nature of the Peculiar Hot Star in the Young LMC Cluster NGC1818

James Liebert (Steward Observatory, the Space Telescope Science Institute), Univ. of Arizona

arxiv:astro-ph/9901312 v1 · 1999-01-21 · 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{3M7CJUU2TH7OZWW3EUMO6M7V34}

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	2026-05-18T01:07:36.664474Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

db3e24d29a99feecdadb2518ef33f5df0de76d627c8ddf2b96c05e57840f97f4

Aliases

arxiv: astro-ph/9901312 · arxiv_version: astro-ph/9901312v1 · doi: 10.48550/arxiv.astro-ph/9901312 · pith_short_12: 3M7CJUU2TH7O · pith_short_16: 3M7CJUU2TH7OZWW3 · pith_short_8: 3M7CJUU2

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/3M7CJUU2TH7OZWW3EUMO6M7V34 \
  | 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: db3e24d29a99feecdadb2518ef33f5df0de76d627c8ddf2b96c05e57840f97f4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df20bbc91ff57a24594d231e0553d3d9e3e42c055c279f64119989a47761651e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-01-21T23:22:40Z",
    "title_canon_sha256": "f530c67b69d040be19f22a9391b42cec0c9dec76387a9eb58605bf403280e04d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9901312",
    "kind": "arxiv",
    "version": 1
  }
}