Pith Number

pith:4RWSYSWG

pith:2010:4RWSYSWGXJATIVYJ6FOHB5SIGY

not attested not anchored not stored refs pending

Measuring Black Hole Spin in OJ287

A.Gopakumar, D.Merritt, H.J.Lehto, H.Rampadarath, K.Nilsson, M.Basta, M. Valtonen, R.Hudec, R. Saunders, S.Mikkola, T.Hyv\"onen

arxiv:1001.1284 v1 · 2010-01-08 · astro-ph.CO · 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{4RWSYSWGXJATIVYJ6FOHB5SIGY}

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	2026-05-18T02:10:03.705270Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e46d2c4ac6ba41345709f15c70f648362b0c55f74a83d9dcff78d03355dac555

Aliases

arxiv: 1001.1284 · arxiv_version: 1001.1284v1 · doi: 10.48550/arxiv.1001.1284 · pith_short_12: 4RWSYSWGXJAT · pith_short_16: 4RWSYSWGXJATIVYJ · pith_short_8: 4RWSYSWG

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/4RWSYSWGXJATIVYJ6FOHB5SIGY \
  | 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: e46d2c4ac6ba41345709f15c70f648362b0c55f74a83d9dcff78d03355dac555

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5b9103430d1415d7210641bcf16f2e5954027db7b6b5569a1cec1c0556d7299",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-01-08T14:20:04Z",
    "title_canon_sha256": "22f22920566e8f11c7cabd317bc9274f58116b56a1c5ff27a07e300f754ac61d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.1284",
    "kind": "arxiv",
    "version": 1
  }
}