Pith Number

pith:27YBTHQJ

pith:1999:27YBTHQJOCQCHY2KRHE7K5C6CU

not attested not anchored not stored refs pending

Measuring Cosmological Parameters with the JVAS and CLASS Gravitational Lens Surveys

A. G. de Bruyn, C. D. Fassnacht, D. R. Marlow, D. Rusin, E. Xanthopoulos, I. W. A. Browne, J. F. Macias-Perez, L. V. E. Koopmans, N. Jackson, P. Helbig, P. N. Wilkinson, R. D. Blandford, R. Quast, S. T. Myers

arxiv:astro-ph/9904007 v1 · 1999-04-01 · 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{27YBTHQJOCQCHY2KRHE7K5C6CU}

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	2026-05-18T02:14:08.863764Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7f0199e0970a023e34a89c9f5745e152352f6c93f3eaef076c2d3cc5f8cae40

Aliases

arxiv: astro-ph/9904007 · arxiv_version: astro-ph/9904007v1 · doi: 10.48550/arxiv.astro-ph/9904007 · pith_short_12: 27YBTHQJOCQC · pith_short_16: 27YBTHQJOCQCHY2K · pith_short_8: 27YBTHQJ

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/27YBTHQJOCQCHY2KRHE7K5C6CU \
  | 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: d7f0199e0970a023e34a89c9f5745e152352f6c93f3eaef076c2d3cc5f8cae40

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e890f344c52c76198847b87734240ff3eb91c22a32e49923d3ef5512e2c2e570",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-04-01T08:42:46Z",
    "title_canon_sha256": "371720c14eda27d776ca4c022ab05710e9dc2e7be0b7c1836817e3f646adefce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9904007",
    "kind": "arxiv",
    "version": 1
  }
}