Pith Number

pith:ZUN2D5NU

pith:1998:ZUN2D5NUXIOKVUDERU7BIB6MEK

not attested not anchored not stored refs pending

Lifetime of Surface Features and Stellar Rotation: A Wavelet Time-Frequency Approach

Peter Frick, Sallie Baliunas, Willie Soon

arxiv:astro-ph/9811114 v1 · 1998-11-07 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZUN2D5NUXIOKVUDERU7BIB6MEK}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:07:36.887583Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cd1ba1f5b4ba1caad0648d3e1407cc2292b2ae37b6f0f5b8ac5a46a162edeed8

Aliases

arxiv: astro-ph/9811114 · arxiv_version: astro-ph/9811114v1 · doi: 10.48550/arxiv.astro-ph/9811114 · pith_short_12: ZUN2D5NUXIOK · pith_short_16: ZUN2D5NUXIOKVUDE · pith_short_8: ZUN2D5NU

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/ZUN2D5NUXIOKVUDERU7BIB6MEK \
  | 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: cd1ba1f5b4ba1caad0648d3e1407cc2292b2ae37b6f0f5b8ac5a46a162edeed8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18877dfc5a836140031369665f90f7922e13181145ec046fcee27e90c2bb40a1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-11-07T03:29:28Z",
    "title_canon_sha256": "fc006ad44661db7126d7ad2bdc6ff78bfeecb38a119782298846fd5b42945d8e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9811114",
    "kind": "arxiv",
    "version": 1
  }
}