Pith Number

pith:K2CMBI43

pith:2009:K2CMBI43HGDRIHVG3BMBNCOJM3

not attested not anchored not stored refs pending

Obscuring and feeding supermassive black holes with evolving nuclear star clusters

A. Burkert, K. Meisenheimer, M. Camenzind, M. Krause, M. Schartmann, R.I. Davies

arxiv:0911.5641 v1 · 2009-11-30 · 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{K2CMBI43HGDRIHVG3BMBNCOJM3}

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	2026-05-18T02:10:35.582475Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5684c0a39b3987141ea6d8581689c966ff6ffa152f008394706aba23875815c6

Aliases

arxiv: 0911.5641 · arxiv_version: 0911.5641v1 · doi: 10.48550/arxiv.0911.5641 · pith_short_12: K2CMBI43HGDR · pith_short_16: K2CMBI43HGDRIHVG · pith_short_8: K2CMBI43

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/K2CMBI43HGDRIHVG3BMBNCOJM3 \
  | 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: 5684c0a39b3987141ea6d8581689c966ff6ffa152f008394706aba23875815c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0afef558e3f77ad3ac2a313dc9caaa01e2096c9e338c092fe3b99b4f95b67c11",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-11-30T13:47:11Z",
    "title_canon_sha256": "7275ebffea1f93bf364c313bc2afc8c6378a1975e1a5a56e1b64642b0a098a0a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.5641",
    "kind": "arxiv",
    "version": 1
  }
}