Pith Number

pith:W2JM6XEC

pith:1998:W2JM6XECW7DNYT2XHGHKRFNWEV

not attested not anchored not stored refs pending

Theoretical Models for Classical Cepheids: II. Period-Luminosity, Period-Color and Period-Luminosity-Color Relations

F. Caputo (Astron. Obs. of Capodimonte), G. Bono (Astron. Obs. of Trieste), M. Marconi (Astron. Obs. of Capodimonte), V. Castellani (U. of Pisa)

arxiv:astro-ph/9809127 v1 · 1998-09-10 · 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{W2JM6XECW7DNYT2XHGHKRFNWEV}

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	2026-05-18T02:40:34.924728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b692cf5c82b7c6dc4f57398ea895b625783da0f462038a97680f1c33ac2f4693

Aliases

arxiv: astro-ph/9809127 · arxiv_version: astro-ph/9809127v1 · doi: 10.48550/arxiv.astro-ph/9809127 · pith_short_12: W2JM6XECW7DN · pith_short_16: W2JM6XECW7DNYT2X · pith_short_8: W2JM6XEC

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/W2JM6XECW7DNYT2XHGHKRFNWEV \
  | 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: b692cf5c82b7c6dc4f57398ea895b625783da0f462038a97680f1c33ac2f4693

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bce51e937d91a531d0c49a996b6b19219d6e14a4770d7b8a7671ec75895775f3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-09-10T09:04:08Z",
    "title_canon_sha256": "eeb591f774ab3163b1d3214dd11315b9f2b873b694693b508e34f44db41a2869"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9809127",
    "kind": "arxiv",
    "version": 1
  }
}