Pith Number

pith:SEP2PNWZ

pith:2023:SEP2PNWZMFDKZTLTLHHAZBAOMK

not attested not anchored not stored refs pending

The Great Dimming of the hypergiant star RW Cephei: CHARA Array images and spectral analysis

A. Labdon, B. R. Setterholm, C. Lanthermann, C. L. Davies, C. Sigismondi, D. R. Gies, F. Baron, G. H. Schaefer, J.-B. Le Bouquin, J. D. Monnier, J. Ennis, K. A. Shepard, N. Anugu, R. M. Roettenbacher, S. Kraus, T. Gardner, T. ten Brummelaar, W. Vollmann

arxiv:2307.04926 v1 · 2023-07-10 · 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{SEP2PNWZMFDKZTLTLHHAZBAOMK}

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	2026-07-05T06:39:04.194972Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

911fa7b6d96146accd7359ce0c840e62ad15d957738a404e25d01a190fae6bd9

Aliases

arxiv: 2307.04926 · arxiv_version: 2307.04926v1 · doi: 10.48550/arxiv.2307.04926 · pith_short_12: SEP2PNWZMFDK · pith_short_16: SEP2PNWZMFDKZTLT · pith_short_8: SEP2PNWZ

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/SEP2PNWZMFDKZTLTLHHAZBAOMK \
  | 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: 911fa7b6d96146accd7359ce0c840e62ad15d957738a404e25d01a190fae6bd9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26b5dd4eb95f9a45198c301a013d275308a9e86b8be32856fb10476ab903add3",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2023-07-10T22:19:38Z",
    "title_canon_sha256": "baf96a3170457409338c6c3ad709a2859a3f50b34b4c3b2d358c7f708a3b8f72"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2307.04926",
    "kind": "arxiv",
    "version": 1
  }
}