Pith Number

pith:2XNQ7WU4

pith:2025:2XNQ7WU4VTMMJYM5JF2ALOPOPL

not attested not anchored not stored refs pending

Where to search for supermassive binary black holes

Edi Bon, Mauro D'Onofrio, Natasa Bon, Paola Marziani

arxiv:2502.12664 v1 · 2025-02-18 · astro-ph.GA · 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{2XNQ7WU4VTMMJYM5JF2ALOPOPL}

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	2026-07-05T10:15:59.091446Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5db0fda9cacd8c4e19d497405b9ee7ae03a2bb3d64cdb9527c60a5c47f2b9ad

Aliases

arxiv: 2502.12664 · arxiv_version: 2502.12664v1 · doi: 10.48550/arxiv.2502.12664 · pith_short_12: 2XNQ7WU4VTMM · pith_short_16: 2XNQ7WU4VTMMJYM5 · pith_short_8: 2XNQ7WU4

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/2XNQ7WU4VTMMJYM5JF2ALOPOPL \
  | 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: d5db0fda9cacd8c4e19d497405b9ee7ae03a2bb3d64cdb9527c60a5c47f2b9ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "77499431da4a2545fbc5f32aa555305bc0877f936395f85317dfbc3d137bdbb3",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.HE"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-02-18T09:11:45Z",
    "title_canon_sha256": "b306d64426f8cb6368c553106a5c562d41b6fbcc7182adb6d86f2686d3c9351d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.12664",
    "kind": "arxiv",
    "version": 1
  }
}