Pith Number

pith:VFMCPJMP

pith:2003:VFMCPJMPSHJMVJEQKMRUYGMVL4

not attested not anchored not stored refs pending

Multi-frequency & Multi-epoch VLBI study of Cygnus A

A. Witzel, E. Middelberg, J.A. Zensus (Max-Planck-Institut fuer Radioastronomie), M. Kadler, T.P. Krichbaum, U. Bach, W. Alef

arxiv:astro-ph/0309403 v1 · 2003-09-15 · 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{VFMCPJMPSHJMVJEQKMRUYGMVL4}

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	2026-07-04T14:12:54.060750Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a95827a58f91d2caa49053234c19955f1e28cb0f4e12b46b03eee08211707e46

Aliases

arxiv: astro-ph/0309403 · arxiv_version: astro-ph/0309403v1 · doi: 10.48550/arxiv.astro-ph/0309403 · pith_short_12: VFMCPJMPSHJM · pith_short_16: VFMCPJMPSHJMVJEQ · pith_short_8: VFMCPJMP

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/VFMCPJMPSHJMVJEQKMRUYGMVL4 \
  | 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: a95827a58f91d2caa49053234c19955f1e28cb0f4e12b46b03eee08211707e46

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e283ed398b54f711e224b012724348efe957458f914235853fb60c9dce04fc3a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-09-15T16:12:25Z",
    "title_canon_sha256": "34ae15e6341b73a2c915fe1fa4568b3100fa8c69da5935502ea0da80780c3971"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0309403",
    "kind": "arxiv",
    "version": 1
  }
}