Pith Number

pith:DWJ4SHUD

pith:2002:DWJ4SHUDQ2WUND2QNMPMTCRB3Y

not attested not anchored not stored refs pending

The Redshift of the Lensed Object in the Einstein Ring B0218+357

Charles R. Lawrence, Judith G. Cohen, Roger D. Blandford

arxiv:astro-ph/0209457 v1 · 2002-09-22 · 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{DWJ4SHUDQ2WUND2QNMPMTCRB3Y}

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	2026-07-04T16:30:49.707267Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1d93c91e8386ad468f506b1ec98a21de35fbf3695d36c7cb8b82e275bc4221c9

Aliases

arxiv: astro-ph/0209457 · arxiv_version: astro-ph/0209457v1 · doi: 10.48550/arxiv.astro-ph/0209457 · pith_short_12: DWJ4SHUDQ2WU · pith_short_16: DWJ4SHUDQ2WUND2Q · pith_short_8: DWJ4SHUD

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/DWJ4SHUDQ2WUND2QNMPMTCRB3Y \
  | 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: 1d93c91e8386ad468f506b1ec98a21de35fbf3695d36c7cb8b82e275bc4221c9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c12168a5aae6dfdcb42a34729f16866d0ba27ab48fc62dbb4472406a7e0b8d1f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-09-22T19:26:18Z",
    "title_canon_sha256": "7887acee42f2102ad27681f8e9edd52f07fd84249a21a1055df518ce45039dec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0209457",
    "kind": "arxiv",
    "version": 1
  }
}