Pith Number

pith:42EC4INY

pith:2001:42EC4INYSDIS6DUH5A7AX5DHYO

not attested not anchored not stored refs pending

A Study of 3CR Radio Galaxies from z = 0.15 to 0.65. I. Evidence for an Evolutionary Relationship Between Quasars and Radio Galaxies

E. Ellingson, John T. Stocke, Michael Harvanek

arxiv:astro-ph/0111251 v1 · 2001-11-13 · 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{42EC4INYSDIS6DUH5A7AX5DHYO}

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	2026-07-04T16:24:27.348093Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e6882e21b890d12f0e87e83e0bf467c39662f4c2b0256b07afbd8ca06aa17a11

Aliases

arxiv: astro-ph/0111251 · arxiv_version: astro-ph/0111251v1 · doi: 10.48550/arxiv.astro-ph/0111251 · pith_short_12: 42EC4INYSDIS · pith_short_16: 42EC4INYSDIS6DUH · pith_short_8: 42EC4INY

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/42EC4INYSDIS6DUH5A7AX5DHYO \
  | 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: e6882e21b890d12f0e87e83e0bf467c39662f4c2b0256b07afbd8ca06aa17a11

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "39a77bb2ba3d12883bd72956db106b7e356dd9ba2426d0d0d456a5851c72787a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-11-13T19:06:15Z",
    "title_canon_sha256": "5930cb91d350f5d54c7e50daaf136664c9755f3153ea9464df5f735226ee33ce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0111251",
    "kind": "arxiv",
    "version": 1
  }
}