Pith Number

pith:WL4IY2Q6

pith:2002:WL4IY2Q6P35QVEZHD4SE5EGKAB

not attested not anchored not stored refs pending

CLASS B0445+123: a new two-image gravitational lens system

2), (2) JIVE, (3) Caltech, (4) Kapteyn Inst. Groningen, 5), (5) ASTRON Dwingeloo, (6) STScI, (7) NRAO Socorro, (8) University of Pennsylvania, 9), (9) CfA), A.C.S. Readhead (3), A.D. Biggs (1, A.G. de Bruyn (4, C.D. Fassnacht (6), D.R. Marlow (1), D. Rusin (8, I.W.A. Browne (1), J.P. McKean (1), K.H. Chae (1), L.V.E. Koopmans (3), M.K. Argo (1), M. Norbury (1), N.J. Jackson (1), P.M. Phillips (1), P.N. Wilkinson (1) ((1) University of Manchester JBO, R.D. Blandford (3), S.T. Myers (7), T.J. Pearson (3), T. York (1)

arxiv:astro-ph/0210234 v1 · 2002-10-10 · 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{WL4IY2Q6P35QVEZHD4SE5EGKAB}

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	2026-07-04T16:30:57.076237Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b2f88c6a1e7efb0a93271f244e90ca005cc2d395f28ad481df07c6625f8c23fc

Aliases

arxiv: astro-ph/0210234 · arxiv_version: astro-ph/0210234v1 · doi: 10.48550/arxiv.astro-ph/0210234 · pith_short_12: WL4IY2Q6P35Q · pith_short_16: WL4IY2Q6P35QVEZH · pith_short_8: WL4IY2Q6

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/WL4IY2Q6P35QVEZHD4SE5EGKAB \
  | 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: b2f88c6a1e7efb0a93271f244e90ca005cc2d395f28ad481df07c6625f8c23fc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d40af668f1de1cd857242622561f36a078eba0b90211f3b0cd256b0b0b14e371",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-10-10T13:56:33Z",
    "title_canon_sha256": "f5aab5ed7e7f28ca2d3bb372460f60a8e6d72fa4f4e99eb460c3cc2e376d2e93"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0210234",
    "kind": "arxiv",
    "version": 1
  }
}