Pith Number

pith:QY7WMB6W

pith:2018:QY7WMB6WKIKSI5KFHN6ELWUCFU

not attested not anchored not stored refs pending

Swift data hint at a binary Super Massive Black Hole candidate at sub-parsec separation

A. Caccianiga, A. Moretti, A. Zaino, C. Cicone, C. Vignali, G. A. Matzeu, L. Ballo, M. Landoni, P. Severgnini, R. Della Ceca, S. Campana, V. Braito, V. La Parola

arxiv:1806.10150 v1 · 2018-06-26 · 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{QY7WMB6WKIKSI5KFHN6ELWUCFU}

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	2026-05-18T00:12:13.333531Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

863f6607d652152475453b7c45da822d086c50a6a4bb2d34aae7901086eb5267

Aliases

arxiv: 1806.10150 · arxiv_version: 1806.10150v1 · doi: 10.48550/arxiv.1806.10150 · pith_short_12: QY7WMB6WKIKS · pith_short_16: QY7WMB6WKIKSI5KF · pith_short_8: QY7WMB6W

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/QY7WMB6WKIKSI5KFHN6ELWUCFU \
  | 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: 863f6607d652152475453b7c45da822d086c50a6a4bb2d34aae7901086eb5267

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f0102ad1e72471831b9e5fb06c84b6909f16ab95a53e30e861edf0fbe1e9b1e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2018-06-26T18:00:13Z",
    "title_canon_sha256": "33edcff872b289f1a8b277e54d69cc773737fcbed94cfe2e1615313431acd2be"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.10150",
    "kind": "arxiv",
    "version": 1
  }
}