Pith Number

pith:XD4WJTW5

pith:2016:XD4WJTW5AR7XW5KSA5DH7VBTWV

not attested not anchored not stored refs pending

A Normalized Sunspot-Area Series Starting in 1832: an Update

F. S\'anchez-Bajo, J.M. Vaquero, M.C. Gallego, V.M.S. Carrasco

arxiv:1606.04280 v1 · 2016-06-14 · 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{XD4WJTW5AR7XW5KSA5DH7VBTWV}

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	2026-05-18T01:10:47.274388Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8f964cedd047f7b755207467fd433b55a2208d5602e2fdddd7344c3d8cec797

Aliases

arxiv: 1606.04280 · arxiv_version: 1606.04280v1 · doi: 10.48550/arxiv.1606.04280 · pith_short_12: XD4WJTW5AR7X · pith_short_16: XD4WJTW5AR7XW5KS · pith_short_8: XD4WJTW5

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/XD4WJTW5AR7XW5KSA5DH7VBTWV \
  | 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: b8f964cedd047f7b755207467fd433b55a2208d5602e2fdddd7344c3d8cec797

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b500e9568d00e16ed26db589b253e4737a87125a9abf2e5837675492e8f8297",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-06-14T09:44:36Z",
    "title_canon_sha256": "d7b96ff87ec7b19c5ca615b3eb15fc7ee8d0151b98145b1c02e81f0794249531"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.04280",
    "kind": "arxiv",
    "version": 1
  }
}