Pith Number

pith:VRFK5TGD

pith:2002:VRFK5TGDL5LE7ZKUU7DVZBKXTR

not attested not anchored not stored refs pending

LBQS 0015+0239: A Binary Quasar with Small Angular Separation

C.B. Foltz, C.D. Impey, C.E. Petry, F.H. Chaffee, P.C. Hewett

arxiv:astro-ph/0204084 v1 · 2002-04-04 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VRFK5TGDL5LE7ZKUU7DVZBKXTR}

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	2026-05-18T02:40:35.626944Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac4aaeccc35f564fe554a7c75c85579c7679eb0ed7ebe0fc02888358e55f2979

Aliases

arxiv: astro-ph/0204084 · arxiv_version: astro-ph/0204084v1 · doi: 10.48550/arxiv.astro-ph/0204084 · pith_short_12: VRFK5TGDL5LE · pith_short_16: VRFK5TGDL5LE7ZKU · pith_short_8: VRFK5TGD

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/VRFK5TGDL5LE7ZKUU7DVZBKXTR \
  | 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: ac4aaeccc35f564fe554a7c75c85579c7679eb0ed7ebe0fc02888358e55f2979

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80d8833487282441bbbb74c86afde6eef5978b537f6d847a15474d70a859143e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-04-04T16:37:01Z",
    "title_canon_sha256": "67c2f4563052d0bf9386c873f16128a6dfc515c7f5934b5fc14d8b7d27b76bc2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0204084",
    "kind": "arxiv",
    "version": 1
  }
}