Pith Number

pith:X65GBD3M

pith:2003:X65GBD3M35CXPIDZUEGEZCOIAO

not attested not anchored not stored refs pending

Temperature and cooling age of the white dwarf companion of PSR J0218+4232

(2) University of Toronto, (3) California Institute of Technology), C.G. Bassa (1), M.H. van Kerkwijk (2), S.R. Kulkarni (3) ((1) Utrecht University

arxiv:astro-ph/0303439 v1 · 2003-03-19 · 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{X65GBD3M35CXPIDZUEGEZCOIAO}

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	2026-05-18T04:21:41.608390Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bfba608f6cdf4577a079a10c4c89c80388513f596d4b7bc81bb8f2bd5b017879

Aliases

arxiv: astro-ph/0303439 · arxiv_version: astro-ph/0303439v1 · doi: 10.48550/arxiv.astro-ph/0303439 · pith_short_12: X65GBD3M35CX · pith_short_16: X65GBD3M35CXPIDZ · pith_short_8: X65GBD3M

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/X65GBD3M35CXPIDZUEGEZCOIAO \
  | 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: bfba608f6cdf4577a079a10c4c89c80388513f596d4b7bc81bb8f2bd5b017879

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df9a6a59bad9558ef5ff63c74ea15bf146923d7ff2b473e1df42668e83d70215",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-03-19T16:57:03Z",
    "title_canon_sha256": "eb6cf0081ca0a9feebeea428a1e7afa57cf118eb76f682729a0533223677852f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0303439",
    "kind": "arxiv",
    "version": 1
  }
}