Pith Number

pith:BXFHVSDR

pith:2024:BXFHVSDRBEAFHX7ZA5FP4P63IX

not attested not anchored not stored refs pending

The Black-Hole Masses of High-Redshift QSOs

Andrew King

arxiv:2404.16832 v2 · 2024-04-25 · astro-ph.GA · 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{BXFHVSDRBEAFHX7ZA5FP4P63IX}

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	2026-07-05T08:13:33.946493Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0dca7ac871090053dff9074afe3fdb45f0f975c41ce5c539c4ebe3124c6b5fe4

Aliases

arxiv: 2404.16832 · arxiv_version: 2404.16832v2 · doi: 10.48550/arxiv.2404.16832 · pith_short_12: BXFHVSDRBEAF · pith_short_16: BXFHVSDRBEAFHX7Z · pith_short_8: BXFHVSDR

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/BXFHVSDRBEAFHX7ZA5FP4P63IX \
  | 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: 0dca7ac871090053dff9074afe3fdb45f0f975c41ce5c539c4ebe3124c6b5fe4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eb6f97e9bdf10afe2711b399a7f328c399dd2b1608c3d9f94e220334d857fe3a",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2024-04-25T17:59:59Z",
    "title_canon_sha256": "28665356b85cd3c4225a446bab3b30362a1544ecdeaae479bb5a0a8518c196cc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2404.16832",
    "kind": "arxiv",
    "version": 2
  }
}