Pith Number

pith:SZE2CUK6

pith:2003:SZE2CUK6IQKO2HJOAUTPQ5HRFS

not attested not anchored not stored refs pending

The central image of a gravitationally lensed quasar

Christopher S. Kochanek (Ohio State), David Rusin (U Penn), Joshua N. Winn (CfA)

arxiv:astro-ph/0312136 v2 · 2003-12-05 · 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{SZE2CUK6IQKO2HJOAUTPQ5HRFS}

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	2026-05-18T01:40:37.667547Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9649a1515e4414ed1d2e0526f874f12cac98970b5de2a941ca0da16579424559

Aliases

arxiv: astro-ph/0312136 · arxiv_version: astro-ph/0312136v2 · doi: 10.48550/arxiv.astro-ph/0312136 · pith_short_12: SZE2CUK6IQKO · pith_short_16: SZE2CUK6IQKO2HJO · pith_short_8: SZE2CUK6

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/SZE2CUK6IQKO2HJOAUTPQ5HRFS \
  | 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: 9649a1515e4414ed1d2e0526f874f12cac98970b5de2a941ca0da16579424559

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d8298855eaf176edfa587a6efd7916224f197b9cfcfb541db015c008292c7ab",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-12-05T14:32:07Z",
    "title_canon_sha256": "a7e0daf46c721c8b91c755b76867de6fdaf96c2a89e6334efad8b834e45b3655"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0312136",
    "kind": "arxiv",
    "version": 2
  }
}