Pith Number

pith:SPKWF2MF

pith:2015:SPKWF2MF2FO4IIMLERNHANTIWZ

not attested not anchored not stored refs pending

Sunspot latitudes during the Maunder Minimum: a machine-readable catalogue from previous studies

F. S\'anchez-Bajo, J. M. Nogales, J. M. Vaquero

arxiv:1501.05989 v1 · 2015-01-24 · 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{SPKWF2MF2FO4IIMLERNHANTIWZ}

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	2026-05-18T02:28:47.122068Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93d562e985d15dc4218b245a703668b641e1e5943449819ed2c944a7c590377c

Aliases

arxiv: 1501.05989 · arxiv_version: 1501.05989v1 · doi: 10.48550/arxiv.1501.05989 · pith_short_12: SPKWF2MF2FO4 · pith_short_16: SPKWF2MF2FO4IIML · pith_short_8: SPKWF2MF

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/SPKWF2MF2FO4IIMLERNHANTIWZ \
  | 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: 93d562e985d15dc4218b245a703668b641e1e5943449819ed2c944a7c590377c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6b4d32ab4cb25262c937883b3b813ebca8a4029ed20609c288d6f6517b00c428",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-01-24T02:03:02Z",
    "title_canon_sha256": "9a5f9ae50433d86eb9a9e62b1b6bd4d5d33c837a621625142442326a6bc9a4da"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.05989",
    "kind": "arxiv",
    "version": 1
  }
}