Pith Number

pith:4YXWIFR5

pith:2003:4YXWIFR524E7N7GQG3EMOQY7IO

not attested not anchored not stored refs pending

Accelerated expansion of the Crab Nebula and evaluation of its neutron-star parameters

M. Bejger, P. Haensel

arxiv:astro-ph/0301071 v2 · 2003-01-06 · 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{4YXWIFR524E7N7GQG3EMOQY7IO}

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	2026-05-18T04:21:42.280716Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e62f64163dd709f6fcd036c8c7431f43a9ec6b338fa15a22b37935fdbd72aa0f

Aliases

arxiv: astro-ph/0301071 · arxiv_version: astro-ph/0301071v2 · doi: 10.48550/arxiv.astro-ph/0301071 · pith_short_12: 4YXWIFR524E7 · pith_short_16: 4YXWIFR524E7N7GQ · pith_short_8: 4YXWIFR5

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/4YXWIFR524E7N7GQG3EMOQY7IO \
  | 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: e62f64163dd709f6fcd036c8c7431f43a9ec6b338fa15a22b37935fdbd72aa0f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "359c82e540f1b3a48e2a8f72afd31133c6fdf98c7184c1c2174e80fb6253dce3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-01-06T11:49:13Z",
    "title_canon_sha256": "283bda0b39edced35d4851428355a36930d0bf40706cce43852a45140ce16b69"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0301071",
    "kind": "arxiv",
    "version": 2
  }
}