Pith Number

pith:ZJWSMDGH

pith:2013:ZJWSMDGH6M2PCLEUGAYOSIOAIP

not attested not anchored not stored refs pending

Constraining sub-Parsec Binary Supermassive Black Holes in Quasars with Multi-Epoch Spectroscopy. I. The General Quasar Population

Abraham Loeb (CfA), Scott Tremaine (IAS), Xin Liu (UCLA), Yue Shen (Carnegie)

arxiv:1306.4330 v2 · 2013-06-18 · 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{ZJWSMDGH6M2PCLEUGAYOSIOAIP}

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	2026-05-18T01:49:15.316945Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ca6d260cc7f334f12c943030e921c043ce5724df14d25c548e61ac19905d2a3c

Aliases

arxiv: 1306.4330 · arxiv_version: 1306.4330v2 · doi: 10.48550/arxiv.1306.4330 · pith_short_12: ZJWSMDGH6M2P · pith_short_16: ZJWSMDGH6M2PCLEU · pith_short_8: ZJWSMDGH

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/ZJWSMDGH6M2PCLEUGAYOSIOAIP \
  | 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: ca6d260cc7f334f12c943030e921c043ce5724df14d25c548e61ac19905d2a3c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba0ea32c4c29acd6cc54b3d7509f932d78517500f09450aec1b399049f853146",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-06-18T20:00:40Z",
    "title_canon_sha256": "0df5f3978fbe8d2e2a48b4b5ca055883a2e1c8229c6292b858f634942b238a20"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.4330",
    "kind": "arxiv",
    "version": 2
  }
}