Pith Number

pith:4VLE4Q5E

pith:2013:4VLE4Q5EADR3JJTURWS2H427XM

not attested not anchored not stored refs pending

The environments of luminous radio galaxies and type-2 quasars

Cristina Ramos Almeida, C. Tadhunter, D. Dicken, J. Holt, J. I. Gonzalez-Serrano, K. J. Inskip, P. S. Bessiere, R. Morganti

arxiv:1308.4725 v1 · 2013-08-21 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

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	2026-05-18T01:48:04.878040Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5564e43a400e3b4a6748da5a3f35fbb1f4fe411c4413a73d601d02165e5fd9c

Aliases

arxiv: 1308.4725 · arxiv_version: 1308.4725v1 · doi: 10.48550/arxiv.1308.4725 · pith_short_12: 4VLE4Q5EADR3 · pith_short_16: 4VLE4Q5EADR3JJTU · pith_short_8: 4VLE4Q5E

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/4VLE4Q5EADR3JJTURWS2H427XM \
  | 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: e5564e43a400e3b4a6748da5a3f35fbb1f4fe411c4413a73d601d02165e5fd9c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f22540d9b5d2e77ba84bbee288bef87add527f73292c356995d2e8443200701",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-08-21T22:07:18Z",
    "title_canon_sha256": "5a077a23c85011f3afa9c4f3979004603639db00dae1838d4303600d6e076fbc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.4725",
    "kind": "arxiv",
    "version": 1
  }
}