Pith Number

pith:4QF2CJYV

pith:2026:4QF2CJYVHBBYHTVR2ZNEUWVNYU

not attested not anchored not stored refs pending

Center-to-limb variations of solar active regions: Observations of spots, faculae, and network in the 6173 \AA\ continuum

A.G.M. Pietrow, C. Denker, D.J.M. Petit dit de la Roche, E. J. L\"o{\ss}nitz, M. A{\ss}mus, S. Sumra

arxiv:2606.28887 v1 · 2026-06-27 · astro-ph.SR · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4QF2CJYVHBBYHTVR2ZNEUWVNYU}

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	2026-06-30T01:16:56.308946Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e40ba12715384383ceb1d65a4a5aadc50b990d3c6aedd36888a2da0e8314c230

Aliases

arxiv: 2606.28887 · arxiv_version: 2606.28887v1 · doi: 10.48550/arxiv.2606.28887 · pith_short_12: 4QF2CJYVHBBY · pith_short_16: 4QF2CJYVHBBYHTVR · pith_short_8: 4QF2CJYV

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/4QF2CJYVHBBYHTVR2ZNEUWVNYU \
  | 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: e40ba12715384383ceb1d65a4a5aadc50b990d3c6aedd36888a2da0e8314c230

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae280fa151ac276c3c0dc249efa1ac5b4176130b73b29ff1d73264576668a074",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-06-27T12:20:42Z",
    "title_canon_sha256": "54707a5e50fa8bc48ad4b15e7393e70bdd59cfb3fb5f2abdc5ec03581fe73963"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.28887",
    "kind": "arxiv",
    "version": 1
  }
}