Pith Number

pith:F3F3F2XA

pith:2015:F3F3F2XAELRFBEJP5PXKAHQNQB

not attested not anchored not stored refs pending

Intra-day variability observations and the VLBI structure analysis of quasar S4 0917+624

A. Kraus, H.-G. Song, J.A. Zensus, J. Liu, L. Cui, L. Fuhrmann, L.-G. Mi, N. Marchili, T.P. Krichbaum, X. Liu

arxiv:1504.04141 v2 · 2015-04-16 · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F3F3F2XAELRFBEJP5PXKAHQNQB}

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	2026-05-18T01:59:34.800131Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ecbb2eae022e250912febeea01e0d80449a79df37b936da2d77423eed2980c5

Aliases

arxiv: 1504.04141 · arxiv_version: 1504.04141v2 · doi: 10.48550/arxiv.1504.04141 · pith_short_12: F3F3F2XAELRF · pith_short_16: F3F3F2XAELRFBEJP · pith_short_8: F3F3F2XA

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/F3F3F2XAELRFBEJP5PXKAHQNQB \
  | 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: 2ecbb2eae022e250912febeea01e0d80449a79df37b936da2d77423eed2980c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7156dc51bfb7451aed3a08cb6dde2d0c24bd7c5b74f2a03e4d64c0eabafe34eb",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-04-16T08:54:03Z",
    "title_canon_sha256": "32bb29a9b6355643b858ccf073b1984709a59109d307496ba9500fd7c30410cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.04141",
    "kind": "arxiv",
    "version": 2
  }
}