Pith Number

pith:MGGQYGFW

pith:1998:MGGQYGFWY5MXQVKB2XEXM2QWPT

not attested not anchored not stored refs pending

Space VLBI Observations of MKN501

G. Giovannini, L. Feretti, L. Lara, T. Venturi, W.D. Cotton

arxiv:astro-ph/9808261 v1 · 1998-08-24 · 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{MGGQYGFWY5MXQVKB2XEXM2QWPT}

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	2026-07-04T14:15:59.248038Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

618d0c18b6c759785541d5c9766a167cd996000a4cb2f0a2b6a53ece76ad57d9

Aliases

arxiv: astro-ph/9808261 · arxiv_version: astro-ph/9808261v1 · doi: 10.48550/arxiv.astro-ph/9808261 · pith_short_12: MGGQYGFWY5MX · pith_short_16: MGGQYGFWY5MXQVKB · pith_short_8: MGGQYGFW

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/MGGQYGFWY5MXQVKB2XEXM2QWPT \
  | 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: 618d0c18b6c759785541d5c9766a167cd996000a4cb2f0a2b6a53ece76ad57d9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2168838bbae0a8137f7bc94377c21d89cf9afd0326e7c5490d291aa1a8340b10",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-08-24T12:03:16Z",
    "title_canon_sha256": "5cf90b8022973512bd1302136a47d078c7839e3700e71228d51aaad7a61f651a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9808261",
    "kind": "arxiv",
    "version": 1
  }
}