Pith Number

pith:6TJICTJO

pith:2008:6TJICTJOADMHK45DT43KQIO5OA

not attested not anchored not stored refs pending

Cluster Abell 520: a perspective based on member galaxies. A cluster forming at the crossing of three filaments?

E. Ellingson, M. Girardi, R. Barrena, W. Boschin

arxiv:0809.3139 v1 · 2008-09-18 · 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{6TJICTJOADMHK45DT43KQIO5OA}

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	2026-07-04T17:12:53.340512Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f4d2814d2e00d87573a39f36a821dd701c263a243e9962700a53f2a5c1999e66

Aliases

arxiv: 0809.3139 · arxiv_version: 0809.3139v1 · doi: 10.48550/arxiv.0809.3139 · pith_short_12: 6TJICTJOADMH · pith_short_16: 6TJICTJOADMHK45D · pith_short_8: 6TJICTJO

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/6TJICTJOADMHK45DT43KQIO5OA \
  | 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: f4d2814d2e00d87573a39f36a821dd701c263a243e9962700a53f2a5c1999e66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a226e647dd66cc99af1e9304203dd99b6fab7c95747caea5ad90107f560bb85f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-09-18T12:36:07Z",
    "title_canon_sha256": "ad47962148fba54b409c3d70c1bc3bd740796c52cd1b2c1c8e81d6912c53be7a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.3139",
    "kind": "arxiv",
    "version": 1
  }
}