Pith Number

pith:ILUIQHES

pith:2018:ILUIQHESWHM3PD7SWPLXOHBAPW

not attested not anchored not stored refs pending

A Sunspot Catalog for the Period 1952-1986 from Observations Made at the Madrid Astronomical Observatory

A.J.P. Aparicio, F. Clette, J.M. Vaquero, L. Lef\`evre, M.C. Gallego, M.L. Bautista, N. Bravo-Paredes, P. Galaviz

arxiv:1812.01733 v1 · 2018-12-04 · 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{ILUIQHESWHM3PD7SWPLXOHBAPW}

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	2026-07-05T05:30:54.064188Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

42e8881c92b1d9b78ff2b3d7771c207db147651557811653407acd99da7212e8

Aliases

arxiv: 1812.01733 · arxiv_version: 1812.01733v1 · doi: 10.48550/arxiv.1812.01733 · pith_short_12: ILUIQHESWHM3 · pith_short_16: ILUIQHESWHM3PD7S · pith_short_8: ILUIQHES

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/ILUIQHESWHM3PD7SWPLXOHBAPW \
  | 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: 42e8881c92b1d9b78ff2b3d7771c207db147651557811653407acd99da7212e8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "daa154df044cd464648b5df0c946b04f3bfc40c2c2c41ddbd5f98901f7d25f44",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-12-04T22:47:04Z",
    "title_canon_sha256": "794febc8ee162141d0cfd1604bec32e6ee6c0fd89b85773e2847c1387d69b899"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.01733",
    "kind": "arxiv",
    "version": 1
  }
}