Pith Number

pith:T3S4GSYF

pith:1999:T3S4GSYFI5R3PWGDXG5CJCAD5B

not attested not anchored not stored refs pending

High precision difference astrometry applied to the triplet of S5 radio sources B1803+784/Q1928+738/B2007+777

(2) CfA, (3) MPIfR, (4) JPL), A. Witzel (3), E. Ros (1), Harvard, I.I. Shapiro (2), J.C. Guirado (1), J.M. Marcaide (1), M.I. Ratner (2), R.A. Preston (4) ((1) Univ. of Valencia, T.P. Krichbaum (3)

arxiv:astro-ph/9905265 v2 · 1999-05-20 · 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{T3S4GSYFI5R3PWGDXG5CJCAD5B}

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	2026-05-18T04:21:32.213128Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ee5c34b054763b7d8c3b9ba248803e87e33f0031ab1dc872d51a1d8676773ec

Aliases

arxiv: astro-ph/9905265 · arxiv_version: astro-ph/9905265v2 · doi: 10.48550/arxiv.astro-ph/9905265 · pith_short_12: T3S4GSYFI5R3 · pith_short_16: T3S4GSYFI5R3PWGD · pith_short_8: T3S4GSYF

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/T3S4GSYFI5R3PWGDXG5CJCAD5B \
  | 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: 9ee5c34b054763b7d8c3b9ba248803e87e33f0031ab1dc872d51a1d8676773ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "509591476478bbb13d7a6912f2522a7e9e83b858e849cdcec828085eb1f33ebb",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-05-20T14:28:50Z",
    "title_canon_sha256": "227521d477d624ce5dc21ddd81595aec474341e8bf5ea31c710bac62d8eea688"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9905265",
    "kind": "arxiv",
    "version": 2
  }
}