Pith Number

pith:GHCUMVOJ

pith:2001:GHCUMVOJQL5AZFSHQ6R5QIZWJS

not attested not anchored not stored refs pending

A Chandra X-ray Study of Cygnus A - II. The Nucleus

Andrew J. Young, Andrew S. Wilson, David A. Smith, Keith A. Arnaud, Yuichi Terashima

arxiv:astro-ph/0109527 v1 · 2001-09-27 · 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{GHCUMVOJQL5AZFSHQ6R5QIZWJS}

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	2026-07-04T16:24:12.134937Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

31c54655c982fa0c964787a3d823364c80fec3b2e8f41b23d77cda0d5809a26c

Aliases

arxiv: astro-ph/0109527 · arxiv_version: astro-ph/0109527v1 · doi: 10.48550/arxiv.astro-ph/0109527 · pith_short_12: GHCUMVOJQL5A · pith_short_16: GHCUMVOJQL5AZFSH · pith_short_8: GHCUMVOJ

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/GHCUMVOJQL5AZFSHQ6R5QIZWJS \
  | 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: 31c54655c982fa0c964787a3d823364c80fec3b2e8f41b23d77cda0d5809a26c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ce310a1540dee2bc8f8ffa5569c307a2df0ba9f8a97355c3b788098f259722d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-09-27T19:00:12Z",
    "title_canon_sha256": "761752453bafaaa21ce973ba514c92af224e26d854c60d3f8379027f70564903"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0109527",
    "kind": "arxiv",
    "version": 1
  }
}