Pith Number

pith:WRO7XHQA

pith:2021:WRO7XHQAMKOHR7J4A57GXQCDZE

not attested not anchored not stored refs pending

Understanding how fast black holes spin by analysing data from the second gravitational-wave catalogue

Charlie Hoy, Mark Hannam, Stephen Fairhurst, Vaibhav Tiwari

arxiv:2110.13542 v2 · 2021-10-26 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WRO7XHQAMKOHR7J4A57GXQCDZE}

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

2 papers in Pith

Evidence for eccentricity in the population of binary black holes observed by LIGO-Virgo-KAGRA

Signatures of a subpopulation of hierarchical mergers in the GWTC-4 gravitational-wave dataset

Receipt and verification

First computed	2026-07-05T04:17:17.919830Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b45dfb9e00629c78fd3c077e6bc043c93e7041b73532ad89bbb5f23edc3c79db

Aliases

arxiv: 2110.13542 · arxiv_version: 2110.13542v2 · doi: 10.48550/arxiv.2110.13542 · pith_short_12: WRO7XHQAMKOH · pith_short_16: WRO7XHQAMKOHR7J4 · pith_short_8: WRO7XHQA

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/WRO7XHQAMKOHR7J4A57GXQCDZE \
  | 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: b45dfb9e00629c78fd3c077e6bc043c93e7041b73532ad89bbb5f23edc3c79db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "141bb8a9f1dd0e89461b6c62137897542748fe9699d1e6a15523889ac50e31bb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2021-10-26T10:10:48Z",
    "title_canon_sha256": "3dfed9d55ee7df6d0c57ff9bbfae5b0e1550b6228c649e6648972ceaa7ed9841"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.13542",
    "kind": "arxiv",
    "version": 2
  }
}