Pith Number

pith:U27DYXQC

pith:1997:U27DYXQC4TL6DGA5GIZLA4AOUS

not attested not anchored not stored refs pending

Astrometry and geodesy with radio interferometry: experiments, models, results

Christopher S. Jacobs, John L. Fanselow, Ojars J. Sovers

arxiv:astro-ph/9712238 v1 · 1997-12-17 · 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{U27DYXQC4TL6DGA5GIZLA4AOUS}

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	2026-07-04T15:27:10.019113Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a6be3c5e02e4d7e1981d3232b0700ea4aa55b4b81b6bc8dc45cae5bc860d11cc

Aliases

arxiv: astro-ph/9712238 · arxiv_version: astro-ph/9712238v1 · doi: 10.48550/arxiv.astro-ph/9712238 · pith_short_12: U27DYXQC4TL6 · pith_short_16: U27DYXQC4TL6DGA5 · pith_short_8: U27DYXQC

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/U27DYXQC4TL6DGA5GIZLA4AOUS \
  | 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: a6be3c5e02e4d7e1981d3232b0700ea4aa55b4b81b6bc8dc45cae5bc860d11cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "376df20b436359bc3d04ddd4c3d93c47e3641cbee03b5ae8a60e9b6cae7fc215",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-12-17T19:30:49Z",
    "title_canon_sha256": "5830fdc31d4af4816ce53a786cf10f3bf035d453dc8c2124aa3b746278dc2da1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9712238",
    "kind": "arxiv",
    "version": 1
  }
}