Pith Number

pith:SMC5PM6W

pith:2026:SMC5PM6WQDUQRWASUYJNBDXBJ4

not attested not anchored not stored refs pending

Effect of surface magnetic fields on limb darkening in main-sequence stars

A. I. Shapiro, I. Kuhlemann, N. Kostogryz, S. K. Solanki, T. Bhatia, V. Vasilyev, V. Witzke, Y. C. Unruh

arxiv:2606.21912 v1 · 2026-06-20 · 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{SMC5PM6WQDUQRWASUYJNBDXBJ4}

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	2026-06-23T02:13:02.701089Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9305d7b3d680e908d812a612d08ee14f1dd46adf064ce922f0c30ecf3cdf73fb

Aliases

arxiv: 2606.21912 · arxiv_version: 2606.21912v1 · doi: 10.48550/arxiv.2606.21912 · pith_short_12: SMC5PM6WQDUQ · pith_short_16: SMC5PM6WQDUQRWAS · pith_short_8: SMC5PM6W

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/SMC5PM6WQDUQRWASUYJNBDXBJ4 \
  | 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: 9305d7b3d680e908d812a612d08ee14f1dd46adf064ce922f0c30ecf3cdf73fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eb10a19b2acc431eafa10c03c4f87b0d6d4b593bc4fd40d247ed4af904e088fe",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-06-20T07:14:04Z",
    "title_canon_sha256": "da7baa3c3e5a1f3d999e8fde9f22162cb6a9cfda009849ff7e66546bdf0cb582"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.21912",
    "kind": "arxiv",
    "version": 1
  }
}