Pith Number

pith:EW2X3LJW

pith:2023:EW2X3LJWKIAFE7DCT3LTPQZBQ3

not attested not anchored not stored refs pending

Re-calibration of the Sunspot Number: Status Report

A. Mu\~noz-Jaramillo, A. Pevtsov, D. Pesnell, E. W. Cliver, F. Clette, G. Kopp, H. Hayakawa, I. G. Usoskin, J. M. Vaquero, L. Lef\`evre, L. Svalgaard, L. van Driel-Gesztelyi, M. Lockwood, M. Owens, N. Karachik, R. Arlt, S. Mathieu, T. Chatzistergos, T. Dudok de Wit, T. Friedli, V. M. Carrasco

arxiv:2301.02084 v1 · 2023-01-05 · astro-ph.SR · physics.space-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EW2X3LJWKIAFE7DCT3LTPQZBQ3}

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	2026-07-05T05:55:46.476748Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25b57dad365200527c629ed737c32186f297a44764a70e7a42f0a9c321e52b28

Aliases

arxiv: 2301.02084 · arxiv_version: 2301.02084v1 · doi: 10.48550/arxiv.2301.02084 · pith_short_12: EW2X3LJWKIAF · pith_short_16: EW2X3LJWKIAFE7DC · pith_short_8: EW2X3LJW

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/EW2X3LJWKIAFE7DCT3LTPQZBQ3 \
  | 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: 25b57dad365200527c629ed737c32186f297a44764a70e7a42f0a9c321e52b28

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fea94eb0ee35f4ce557c2ed76b65ca02d6ec27367421e2e4285afea4732e8452",
    "cross_cats_sorted": [
      "physics.space-ph"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2023-01-05T14:43:13Z",
    "title_canon_sha256": "afce9484b0eba732b145a8651b20aed8e8e8c982ef5b1ba61029e9de07b40abf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2301.02084",
    "kind": "arxiv",
    "version": 1
  }
}