Pith Number

pith:PJHQE7OB

pith:2013:PJHQE7OBLGTT4JS3AWJ56T43JG

not attested not anchored not stored refs pending

Gravitational-wave Limits from Pulsar Timing Constrain Supermassive Black Hole Evolution

G. Hobbs, J-B. Wang, J. Khoo, J. M. Sarkissian, J. P. W. Verbiest, J. S. B. Wyithe, M. Bailes, M. J. Keith, N. D. R. Bhat, R. M. Shannon, R. N. Manchester, S. Burke-Spolaor, S. Os{\l}owski, V. Ravi, W. A. Coles, W. van Straten, Y. Levin

arxiv:1310.4569 v1 · 2013-10-17 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PJHQE7OBLGTT4JS3AWJ56T43JG}

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	2026-05-18T01:46:58.586592Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a4f027dc159a73e265b0593df4f9b49a70131903193883539540c3bc0181ca1

Aliases

arxiv: 1310.4569 · arxiv_version: 1310.4569v1 · doi: 10.48550/arxiv.1310.4569 · pith_short_12: PJHQE7OBLGTT · pith_short_16: PJHQE7OBLGTT4JS3 · pith_short_8: PJHQE7OB

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/PJHQE7OBLGTT4JS3AWJ56T43JG \
  | 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: 7a4f027dc159a73e265b0593df4f9b49a70131903193883539540c3bc0181ca1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "45bb38c87c8e863d9a6a7e3b47f25ac5cdf60a6d12eedfee90c2a3cfa373ebd0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-10-17T03:45:51Z",
    "title_canon_sha256": "2f63889a4d216d87fd3eb5bf005811507005e7821852eb6fc896087dcee6ab30"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.4569",
    "kind": "arxiv",
    "version": 1
  }
}