Pith Number

pith:FXPEZ4PN

pith:2009:FXPEZ4PNB6VAEXFQLIDF5R3RPH

not attested not anchored not stored refs pending

Measuring the Spins of Stellar Black Holes: A Progress Report

J. E. McClintock, J. F. Steiner, J. Liu, L. Gou, R. F. Penna, R. Narayan

arxiv:0911.5408 v2 · 2009-11-28 · 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{FXPEZ4PNB6VAEXFQLIDF5R3RPH}

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	2026-05-18T02:10:35.964258Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2dde4cf1ed0faa025cb05a065ec77179e797ff3a067371ac884c21797c8c2f02

Aliases

arxiv: 0911.5408 · arxiv_version: 0911.5408v2 · doi: 10.48550/arxiv.0911.5408 · pith_short_12: FXPEZ4PNB6VA · pith_short_16: FXPEZ4PNB6VAEXFQ · pith_short_8: FXPEZ4PN

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/FXPEZ4PNB6VAEXFQLIDF5R3RPH \
  | 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: 2dde4cf1ed0faa025cb05a065ec77179e797ff3a067371ac884c21797c8c2f02

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b02f0c0e39f777f74a0129f99e40d2e72b90862f24b750853cea0e69c1d1bf68",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-11-28T17:27:37Z",
    "title_canon_sha256": "3c066879bb10b6a90732763e7a5f8dbb8b8fc7fad1c1a5d2d3564a501f3028bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.5408",
    "kind": "arxiv",
    "version": 2
  }
}