Pith Number

pith:4WOBLFPK

pith:2002:4WOBLFPKWXTBI2GINZCICG7M3R

not attested not anchored not stored refs pending

Element abundances in cool white dwarfs. II. Ultraviolet observations of DZ white dwarfs

B. Wolff, D. Koester, J. Liebert

arxiv:astro-ph/0204408 v1 · 2002-04-24 · 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{4WOBLFPKWXTBI2GINZCICG7M3R}

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	2026-07-04T16:29:54.741589Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e59c1595eab5e61468c86e44811becdc5fd84ca7f57f8a814e548794ed9d9992

Aliases

arxiv: astro-ph/0204408 · arxiv_version: astro-ph/0204408v1 · doi: 10.48550/arxiv.astro-ph/0204408 · pith_short_12: 4WOBLFPKWXTB · pith_short_16: 4WOBLFPKWXTBI2GI · pith_short_8: 4WOBLFPK

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/4WOBLFPKWXTBI2GINZCICG7M3R \
  | 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: e59c1595eab5e61468c86e44811becdc5fd84ca7f57f8a814e548794ed9d9992

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6569ec8748597655db6998016b96da0b83a2f3879f34cf55769609749beac183",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-04-24T15:30:32Z",
    "title_canon_sha256": "ed8ebb76e868d06c6884e8b93a2fba596855e8e06b08260a0109e6e7ea012f44"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0204408",
    "kind": "arxiv",
    "version": 1
  }
}