Pith Number

pith:CUQ57DST

pith:2008:CUQ57DSTUQ7OTMFHBOPS6NTIFG

not attested not anchored not stored refs pending

A Characteristic Division Between the Fueling of Quasars and Seyferts: Five Simple Tests

Lars Hernquist (CfA), Philip F. Hopkins (Berkeley)

arxiv:0812.2915 v1 · 2008-12-15 · astro-ph

Open paper page JSON 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

Receipt and verification

First computed	2026-05-18T02:35:13.312475Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1521df8e53a43ee9b0a70b9f2f3668298fba0a4a7cabc1279f622ea29f3e9abb

Aliases

arxiv: 0812.2915 · arxiv_version: 0812.2915v1 · doi: 10.48550/arxiv.0812.2915

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/CUQ57DSTUQ7OTMFHBOPS6NTIFG \
  | 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: 1521df8e53a43ee9b0a70b9f2f3668298fba0a4a7cabc1279f622ea29f3e9abb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "266b501281a5e4558117ed2ac08e2401816650b7dbf5ec6060509dc84fa80f95",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-12-15T21:11:31Z",
    "title_canon_sha256": "638174601f978771b8ec0240e8caec107623d6df0756ea319649537856839b60"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.2915",
    "kind": "arxiv",
    "version": 1
  }
}