Pith Number

pith:TJDB5PFN

pith:2009:TJDB5PFNMW7WZIBMASEI7XWKHD

not attested not anchored not stored refs pending

The Growth of Supermassive Black Holes Across Cosmic Time

A. Cattaneo, A.C. Fabian, A. Comastri, A.E. Hornschemeier, A. Georgakakis, A.L. Coil, A.M. Koekemoer, A.R. King, C. Vignali, D.C. Koo, D.J. Croton, D.M. Alexander, D.R. Ballantyne, D. Stern, E.M. Rossi, E.S. Laird, E. Treister, F.E. Bauer, F. Fiore, G. Chartas, G.G. Fazio, G. Hasinger, G. Kauffmann, G.R. Ricker, H. Kunieda, H. Tananbaum, I. Georgantopoulos, J.A. Aird, J.R. Primack, K.A. Flanagan, K.A. Pounds, K. Nandra (Imperial College London), M. Brusa, M. Dickinson, M.G. Watson, M. Stiavelli, M. Volonteri, N.A. Levenson, N.E. White, N. Gehrels, O. Shemmer, P.F. Hopkins, P. Madau, P. Ranalli, R. Della Ceca, R. Gilli, R.J. Ivison, R.S. Somerville, S.D.M. White, T. Boller, T. Ohashi, W.N. Brandt, W.R. Forman, X. Barcons, Y. Li, Y. Terashima, Y. Ueda

arxiv:0903.0547 v1 · 2009-03-03 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TJDB5PFNMW7WZIBMASEI7XWKHD}

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	2026-07-04T15:39:01.307979Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9a461ebcad65bf6ca02c04888fdeca38d979f737038db17d97d7a279078e198b

Aliases

arxiv: 0903.0547 · arxiv_version: 0903.0547v1 · doi: 10.48550/arxiv.0903.0547 · pith_short_12: TJDB5PFNMW7W · pith_short_16: TJDB5PFNMW7WZIBM · pith_short_8: TJDB5PFN

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/TJDB5PFNMW7WZIBMASEI7XWKHD \
  | 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: 9a461ebcad65bf6ca02c04888fdeca38d979f737038db17d97d7a279078e198b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "802d091eb86c1cd2210b515b1bf8b50a1098052fda7268331e5266c6e91bca59",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-03T14:52:23Z",
    "title_canon_sha256": "50bfad7e4dfbdd28c612e4972b140fbb703df017b6c43a7c6e9d5d55339604d1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.0547",
    "kind": "arxiv",
    "version": 1
  }
}