Pith Number

pith:DF2UTHB6

pith:2021:DF2UTHB6D7HRTOA7BT7Y6Z3ZLI

not attested not anchored not stored refs pending

A quasar-based supermassive black hole binary population model: implications for the gravitational-wave background

Andy D. Goulding, Chiara M.F. Mingarelli, J. Andrew Casey-Clyde, Jenny E. Greene, Kris Pardo, Morgan Na\~nez

arxiv:2107.11390 v2 · 2021-07-23 · astro-ph.HE · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DF2UTHB6D7HRTOA7BT7Y6Z3ZLI}

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.

Cited by

1 paper in Pith

Dark QCD Origin of the NANOGrav Signal and Self-Interacting Dark Matter

Receipt and verification

First computed	2026-07-05T03:50:15.678284Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1975499c3e1fcf19b81f0cff8f67795a36c9e9a984bfb6fe024f5f827d8400d9

Aliases

arxiv: 2107.11390 · arxiv_version: 2107.11390v2 · doi: 10.48550/arxiv.2107.11390 · pith_short_12: DF2UTHB6D7HR · pith_short_16: DF2UTHB6D7HRTOA7 · pith_short_8: DF2UTHB6

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/DF2UTHB6D7HRTOA7BT7Y6Z3ZLI \
  | 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: 1975499c3e1fcf19b81f0cff8f67795a36c9e9a984bfb6fe024f5f827d8400d9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "68cbe8e6dab1baf0880fc3aada7a5447aa6afc6db3420edf1377c8910371c232",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-07-23T18:00:03Z",
    "title_canon_sha256": "515bd2c05999fce1ab3602d5eddcac2ca0bdfd0f0a7314ca2b9b8110bdcb2b97"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.11390",
    "kind": "arxiv",
    "version": 2
  }
}