Pith Number

pith:L7TAY24K

pith:2024:L7TAY24KDAR63G3J6OIZTSFO4O

not attested not anchored not stored refs pending

An Automatic Approach for Grouping Sunspots and Calculating Relative Sunspot Number on SDO/HMI Continuum Images

Cui Zhao, Fangyuan He, Haiyan Zhao, Shangbin Yang, Shiyuan Liu, Tingmei Wang, Zhengkun Hu

arxiv:2401.08949 v1 · 2024-01-17 · 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{L7TAY24KDAR63G3J6OIZTSFO4O}

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	2026-07-05T07:34:24.115945Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5fe60c6b8a1823ed9b69f39199c8aee3a90a6082164faa5dd80a974b0dd2e280

Aliases

arxiv: 2401.08949 · arxiv_version: 2401.08949v1 · doi: 10.48550/arxiv.2401.08949 · pith_short_12: L7TAY24KDAR6 · pith_short_16: L7TAY24KDAR63G3J · pith_short_8: L7TAY24K

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/L7TAY24KDAR63G3J6OIZTSFO4O \
  | 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: 5fe60c6b8a1823ed9b69f39199c8aee3a90a6082164faa5dd80a974b0dd2e280

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ef28864b30d19651a2eb53938a1e4949d3e094af83f40090ceea2ea7626504ee",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2024-01-17T03:52:02Z",
    "title_canon_sha256": "70cffd374e63b0903f1d2d0431064978ee070d30c60c67c3d04a5a92843cc0bb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2401.08949",
    "kind": "arxiv",
    "version": 1
  }
}