Pith Number

pith:IQRFP2YS

pith:2004:IQRFP2YS3CMWVVKLT4GM45UIZX

not attested not anchored not stored refs pending

21st Century VLBI: Deep Wide-Field Surveys

J.M. Wrobel, M.A. Garrett, R. Morganti

arxiv:astro-ph/0403642 v1 · 2004-03-27 · 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{IQRFP2YS3CMWVVKLT4GM45UIZX}

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	2026-07-04T14:13:24.471533Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

442257eb12d8996ad54b9f0cce7688cdf6a490252e0ab10608e37c7862ff16a0

Aliases

arxiv: astro-ph/0403642 · arxiv_version: astro-ph/0403642v1 · doi: 10.48550/arxiv.astro-ph/0403642 · pith_short_12: IQRFP2YS3CMW · pith_short_16: IQRFP2YS3CMWVVKL · pith_short_8: IQRFP2YS

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/IQRFP2YS3CMWVVKLT4GM45UIZX \
  | 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: 442257eb12d8996ad54b9f0cce7688cdf6a490252e0ab10608e37c7862ff16a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3abe4943827e4c42224b20e6dffb1d2a09637b345cc3c9e59d07a1311d75879b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-03-27T21:55:01Z",
    "title_canon_sha256": "776bc447702cd2d1ca087df4959dccc4f680c9c410b8ad57a2d95dde7a97e8bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0403642",
    "kind": "arxiv",
    "version": 1
  }
}