Pith Number

pith:QANYLCZA

pith:2005:QANYLCZAEWI7GRQ5ZBQQQB7WGS

not attested not anchored not stored refs pending

Most supermassive black hole growth is obscured by dust

Alejo Martinez-Sansigre, Chris J. Willott, Chris Simpson, Dario Fadda, Francine R. Marleau, Mark Lacy, Matt J. Jarvis, Steve Rawlings

arxiv:astro-ph/0509124 v2 · 2005-09-06 · 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{QANYLCZAEWI7GRQ5ZBQQQB7WGS}

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	2026-07-04T16:52:52.230775Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

801b858b202591f3461dc8610807f6349bb436b0891c068b0869ce8c03ed0d9a

Aliases

arxiv: astro-ph/0509124 · arxiv_version: astro-ph/0509124v2 · doi: 10.48550/arxiv.astro-ph/0509124 · pith_short_12: QANYLCZAEWI7 · pith_short_16: QANYLCZAEWI7GRQ5 · pith_short_8: QANYLCZA

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/QANYLCZAEWI7GRQ5ZBQQQB7WGS \
  | 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: 801b858b202591f3461dc8610807f6349bb436b0891c068b0869ce8c03ed0d9a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "39ea281b53ab4efdc249433b35db3a5121081f5d0d864a46bcb2a0514cc770d5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-09-06T13:52:19Z",
    "title_canon_sha256": "a6b0e83aa46c076f2e4c4ad4c73e392e18734a3da766789e35e53cefbbac92e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0509124",
    "kind": "arxiv",
    "version": 2
  }
}