Pith Number

pith:GCKHDNIN

pith:2009:GCKHDNINSHN2URMKULGEV5QRA3

not attested not anchored not stored refs pending

Where the Wild Things Are: Observational Constraints on Black Holes' Growth

Andrea Merloni (EXC, MPE)

arxiv:0909.2117 v1 · 2009-09-11 · 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{GCKHDNINSHN2URMKULGEV5QRA3}

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	2026-05-18T02:11:57.067121Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

309471b50d91dbaa458aa2cc4af61106d91f379607df49dc3fbe3eb1784cb153

Aliases

arxiv: 0909.2117 · arxiv_version: 0909.2117v1 · doi: 10.48550/arxiv.0909.2117 · pith_short_12: GCKHDNINSHN2 · pith_short_16: GCKHDNINSHN2URMK · pith_short_8: GCKHDNIN

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/GCKHDNINSHN2URMKULGEV5QRA3 \
  | 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: 309471b50d91dbaa458aa2cc4af61106d91f379607df49dc3fbe3eb1784cb153

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "32aa39df6cb7ce195914364aa08680fed4b8cc499c0362a06289e478e59020f1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-11T09:16:51Z",
    "title_canon_sha256": "b5841595cfcfee71b16547fff192958706262105707fece3abd44a4096382e22"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2117",
    "kind": "arxiv",
    "version": 1
  }
}