Pith Number

pith:T4YXK5PI

pith:2011:T4YXK5PIEJS75FGOLWZTADCQHU

not attested not anchored not stored refs pending

The Cluster of Blue Stars Surrounding the M31 Nuclear Black Hole

John Kormendy, Philip Rosenfield, Ralf Bender, Richard F. Green, Tod R. Lauer

arxiv:1112.1419 v1 · 2011-12-06 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T4YXK5PIEJS75FGOLWZTADCQHU}

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	2026-05-18T01:59:16.124110Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f317575e82265fe94ce5db3300c503d1616899405a1306984dd198b097d6f1c

Aliases

arxiv: 1112.1419 · arxiv_version: 1112.1419v1 · doi: 10.48550/arxiv.1112.1419 · pith_short_12: T4YXK5PIEJS7 · pith_short_16: T4YXK5PIEJS75FGO · pith_short_8: T4YXK5PI

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/T4YXK5PIEJS75FGOLWZTADCQHU \
  | 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: 9f317575e82265fe94ce5db3300c503d1616899405a1306984dd198b097d6f1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c903ded02553d213bee9f0b2ccae7e28b0f7451f778e6c0775b54b27404827ab",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-12-06T21:09:56Z",
    "title_canon_sha256": "0a27233b5e059c4db98115df65f86aecf885b3a95ec4a8a689c9c0bbf06d87ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.1419",
    "kind": "arxiv",
    "version": 1
  }
}