Pith Number

pith:W3PLP6Z3

pith:2009:W3PLP6Z3CQXMQ6HDRYXTPMNXNN

not attested not anchored not stored refs pending

The Quasar SDSS J153636.22+044127.0: A Double-Peaked Emitter in a Candidate Binary Black-Hole System

Jonathan Grindlay, Sumin Tang

arxiv:0909.0258 v1 · 2009-09-01 · 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{W3PLP6Z3CQXMQ6HDRYXTPMNXNN}

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	2026-05-18T02:34:36.897712Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b6deb7fb3b142ec878e38e2f37b1b76b536b17a476e74abc115b318760f73893

Aliases

arxiv: 0909.0258 · arxiv_version: 0909.0258v1 · doi: 10.48550/arxiv.0909.0258 · pith_short_12: W3PLP6Z3CQXM · pith_short_16: W3PLP6Z3CQXMQ6HD · pith_short_8: W3PLP6Z3

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/W3PLP6Z3CQXMQ6HDRYXTPMNXNN \
  | 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: b6deb7fb3b142ec878e38e2f37b1b76b536b17a476e74abc115b318760f73893

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82a4c24735caf47228c5957cd6a85d85ee0f0f7934499a92c515ce0c08aa9134",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-01T20:00:03Z",
    "title_canon_sha256": "261bd581994f284b8c2ba804cefc252d6270994e26c8a4035d109ecf9c325e84"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.0258",
    "kind": "arxiv",
    "version": 1
  }
}