Pith Number

pith:F7SBI3DC

pith:1999:F7SBI3DC27IA5VYPP7TZJQUK6P

not attested not anchored not stored refs pending

Making Sense of Sunspot Decay II: Deviations from the Mean Law and Plage Effects

K. Petrovay, L. van Driel-Gesztelyi, V. Martinez-Pillet

arxiv:astro-ph/9906258 v1 · 1999-06-15 · astro-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{F7SBI3DC27IA5VYPP7TZJQUK6P}

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	2026-05-18T01:40:13.039272Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2fe4146c62d7d00ed70f7fe794c28af3e7f58d805fe8f3535e4581df350e6cbe

Aliases

arxiv: astro-ph/9906258 · arxiv_version: astro-ph/9906258v1 · doi: 10.48550/arxiv.astro-ph/9906258 · pith_short_12: F7SBI3DC27IA · pith_short_16: F7SBI3DC27IA5VYP · pith_short_8: F7SBI3DC

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/F7SBI3DC27IA5VYPP7TZJQUK6P \
  | 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: 2fe4146c62d7d00ed70f7fe794c28af3e7f58d805fe8f3535e4581df350e6cbe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d53bb0a77a86888044e1e3e7d22a57eb1d433375d97632c9a72576e5268357eb",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-06-15T20:28:35Z",
    "title_canon_sha256": "ac779078b139b212717d728805e6a5734065cd05d25c4aaaad94f8131e356c8c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9906258",
    "kind": "arxiv",
    "version": 1
  }
}