Pith Number

pith:K57TV6EO

pith:2013:K57TV6EO7OSHJ6VPMSSSTSFFYH

not attested not anchored not stored refs pending

The Sunspot Catalogues of Carrington, Peters, and de la Rue: Quality Control and Machine-readable Versions

J. M. Vaquero, R. Casas

arxiv:1307.3507 v1 · 2013-07-12 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K57TV6EO7OSHJ6VPMSSSTSFFYH}

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	2026-05-18T03:18:38.996836Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

577f3af88efba474faaf64a529c8a5c1f39e748ceca9a29b1737a1a959774cbe

Aliases

arxiv: 1307.3507 · arxiv_version: 1307.3507v1 · doi: 10.48550/arxiv.1307.3507 · pith_short_12: K57TV6EO7OSH · pith_short_16: K57TV6EO7OSHJ6VP · pith_short_8: K57TV6EO

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/K57TV6EO7OSHJ6VPMSSSTSFFYH \
  | 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: 577f3af88efba474faaf64a529c8a5c1f39e748ceca9a29b1737a1a959774cbe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0f24dcedf8279eac14f330b3cf6ec93b46bb8ce9db6f46cd94dadf4ce9e5da9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-07-12T16:36:33Z",
    "title_canon_sha256": "221b14bf24c2d6b6b836e8caa17de9e779eebb096cf55a4aba82472cce76fbfb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.3507",
    "kind": "arxiv",
    "version": 1
  }
}