Pith Number

pith:FNVEK5HS

pith:2015:FNVEK5HSMIGM76HOFQY6OYLIOS

not attested not anchored not stored refs pending

70 years of Sunspot Observations at Kanzelh\"ohe Observatory: systematic study of parameters affecting the derivation of the relative sunspot number

Astrid M. Veronig, Dietmar Baumgartner, Heinrich Freislich, Heinz Strutzmann, Manuela Temmer, Werner P\"otzi

arxiv:1512.00270 v2 · 2015-12-01 · astro-ph.IM · 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{FNVEK5HSMIGM76HOFQY6OYLIOS}

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	2026-05-18T01:17:18.163682Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2b6a4574f2620ccff8ee2c31e7616874823a69aaf7c200b411cfa547b8e96d36

Aliases

arxiv: 1512.00270 · arxiv_version: 1512.00270v2 · doi: 10.48550/arxiv.1512.00270 · pith_short_12: FNVEK5HSMIGM · pith_short_16: FNVEK5HSMIGM76HO · pith_short_8: FNVEK5HS

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/FNVEK5HSMIGM76HOFQY6OYLIOS \
  | 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: 2b6a4574f2620ccff8ee2c31e7616874823a69aaf7c200b411cfa547b8e96d36

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "86c14650115821bc5ac72f4e2bdb8727758691bab6fe85d62704feb6e357a01b",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2015-12-01T14:35:56Z",
    "title_canon_sha256": "1f324c428175fb288a3d125d7b89701e02e3338a97d3ae46529dcd5508745d9b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.00270",
    "kind": "arxiv",
    "version": 2
  }
}