Pith Number

pith:KATCTQQE

pith:2000:KATCTQQEM33WZ2K4YHYSO32Z2P

not attested not anchored not stored refs pending

Multi-frequency VLBI observations of faint gigahertz peaked spectrum sources

Huib-Jan van Langevelde (JIVE), Ignas Snellen (IoA Cambridge), Richard Schilizzi (JIVE/Leiden)

arxiv:astro-ph/0002129 v2 · 2000-02-06 · 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{KATCTQQEM33WZ2K4YHYSO32Z2P}

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	2026-05-18T01:07:46.871431Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

502629c20466f76ce95cc1f1276f59d3c692509f42022ad7116a5e69b25a5de7

Aliases

arxiv: astro-ph/0002129 · arxiv_version: astro-ph/0002129v2 · doi: 10.48550/arxiv.astro-ph/0002129 · pith_short_12: KATCTQQEM33W · pith_short_16: KATCTQQEM33WZ2K4 · pith_short_8: KATCTQQE

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/KATCTQQEM33WZ2K4YHYSO32Z2P \
  | 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: 502629c20466f76ce95cc1f1276f59d3c692509f42022ad7116a5e69b25a5de7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de109000cecaf65121b513c49e98ee43bf232a0f536e04d9979bac5fd4260498",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-02-06T17:56:02Z",
    "title_canon_sha256": "678f9eb464c651e8860e95ee347f926bdc8f8a46cb1b215d0e2dca53d95ba0ca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0002129",
    "kind": "arxiv",
    "version": 2
  }
}