Pith Number

pith:S4KV5T4I

pith:2013:S4KV5T4IS44ERG4L7LDGPJ6RBQ

not attested not anchored not stored refs pending

VLBA observations of a rare multiple quasar imaging event caused by refraction in the interstellar medium

A.B. Pushkarev, A.C.S. Readhead, E. Ros, H.D. Aller, J.A. Zensus, J.L. Richards, M.F. Aller, M.L. Lister, T. Hovatta, T. Savolainen, W. Max-Moerbeck, Y.Y. Kovalev

arxiv:1305.6005 v1 · 2013-05-26 · astro-ph.CO · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

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	2026-05-18T03:19:14.701385Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

97155ecf889738489b8bfac667a7d10c0392388046cba5067060f6c680a566ef

Aliases

arxiv: 1305.6005 · arxiv_version: 1305.6005v1 · doi: 10.48550/arxiv.1305.6005 · pith_short_12: S4KV5T4IS44E · pith_short_16: S4KV5T4IS44ERG4L · pith_short_8: S4KV5T4I

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/S4KV5T4IS44ERG4L7LDGPJ6RBQ \
  | 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: 97155ecf889738489b8bfac667a7d10c0392388046cba5067060f6c680a566ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bce73462e44338bcb0f5f6f3122c9feac97ededb72ad236e45c72f17f7e89917",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-05-26T08:40:31Z",
    "title_canon_sha256": "a42ad6ab25379995e1d29a9d1bb39317acd42f41f02597b36ccd46f9f0daee18"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.6005",
    "kind": "arxiv",
    "version": 1
  }
}