Pith Number

pith:ZX4IAOFJ

pith:2011:ZX4IAOFJHINBNHBZFVONHQHIFP

not attested not anchored not stored refs pending

Constraints on the black hole spin in the quasar SDSS J094533.99+100950.1

Aleksander Sadowski, Bozena Czerny, Krzysztof Hryniewicz, Marek Nikolajuk

arxiv:1104.2734 v1 · 2011-04-14 · 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{ZX4IAOFJHINBNHBZFVONHQHIFP}

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	2026-05-18T02:02:29.094378Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cdf88038a93a1a169c392d5cd3c0e82bf53bbeb284bf748aca11b21abca4597c

Aliases

arxiv: 1104.2734 · arxiv_version: 1104.2734v1 · doi: 10.48550/arxiv.1104.2734 · pith_short_12: ZX4IAOFJHINB · pith_short_16: ZX4IAOFJHINBNHBZ · pith_short_8: ZX4IAOFJ

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/ZX4IAOFJHINBNHBZFVONHQHIFP \
  | 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: cdf88038a93a1a169c392d5cd3c0e82bf53bbeb284bf748aca11b21abca4597c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6610ba27bab64f4576b0c6faf13a3aa7a197f07446cff4edceaf4133f2442ec0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-04-14T11:47:53Z",
    "title_canon_sha256": "cb56be46316e81d001c97f263e1e232a0f92ee339c15735b154df3e0fe9ca451"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.2734",
    "kind": "arxiv",
    "version": 1
  }
}