Pith Number

pith:BGP7M5LL

pith:2009:BGP7M5LLOK6N2WECRZ7YU44WLD

not attested not anchored not stored refs pending

On the origin of reverse polarity patches found by Hinode in sunspot penumbrae

2), (2) Departamento de Astrofisica, (3) Kwasan, Hida Observatories, Japan), J. Sanchez Almeida (1, K. Ichimoto (3) ((1) Instituto de Astrofisica de Canarias, Kyoto, Kyoto University, La Laguna, Spain, Tenerife, Universidad de La Laguna

arxiv:0909.3232 v1 · 2009-09-17 · astro-ph.SR

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

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	2026-05-18T02:11:46.879251Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

099ff6756b72bcdd58828e7f8a739658d983fc6a7c1dcfc062b1047efbc42f89

Aliases

arxiv: 0909.3232 · arxiv_version: 0909.3232v1 · doi: 10.48550/arxiv.0909.3232 · pith_short_12: BGP7M5LLOK6N · pith_short_16: BGP7M5LLOK6N2WEC · pith_short_8: BGP7M5LL

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/BGP7M5LLOK6N2WECRZ7YU44WLD \
  | 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: 099ff6756b72bcdd58828e7f8a739658d983fc6a7c1dcfc062b1047efbc42f89

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0329c5d171c7aaba85cdaaee880a3f8c3ca1b0e96436f6256810ac2e661617f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-09-17T14:18:41Z",
    "title_canon_sha256": "54cf691acd5a131a89918e0d3c861109a21c7a740f30d5ec2a46ab1d15a1477c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.3232",
    "kind": "arxiv",
    "version": 1
  }
}