Pith Number

pith:2PZDIM2J

pith:1998:2PZDIM2JZ2QO32WZ6SNMR2WEP6

not attested not anchored not stored refs pending

Evidence for a massive BH in the S0 galaxy NGC 4342

Frank C. van den Bosch (University of Washington), Nicolas Cretton (Leiden Observatory)

arxiv:astro-ph/9805324 v1 · 1998-05-26 · 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{2PZDIM2JZ2QO32WZ6SNMR2WEP6}

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	2026-05-18T01:40:14.149407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3f2343349cea0edead9f49ac8eac47fb48821f0deb8497eb402ea1b0d6a744d

Aliases

arxiv: astro-ph/9805324 · arxiv_version: astro-ph/9805324v1 · doi: 10.48550/arxiv.astro-ph/9805324 · pith_short_12: 2PZDIM2JZ2QO · pith_short_16: 2PZDIM2JZ2QO32WZ · pith_short_8: 2PZDIM2J

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/2PZDIM2JZ2QO32WZ6SNMR2WEP6 \
  | 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: d3f2343349cea0edead9f49ac8eac47fb48821f0deb8497eb402ea1b0d6a744d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ae64a852d0940c820259abbf34faa605d55d112b2420195dbb301f2fe39f5fe",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-05-26T20:18:33Z",
    "title_canon_sha256": "4c25e9752ae94beffbfc432add21abae85fc65ac5461cd0f1758c93569231999"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9805324",
    "kind": "arxiv",
    "version": 1
  }
}