Pith Number

pith:UGO2ZJ6W

pith:2013:UGO2ZJ6WOOXD54MQ47HOKNB4HR

not attested not anchored not stored refs pending

An observational correlation between stellar brightness variations and surface gravity

1), ((1) Vanderbilt University, 2), (2) Fisk University, (3) UC Berkeley, (4) Lehigh University), Fabienne A. Bastien (1), Gibor Basri (3), Joshua Pepper (4, Keivan G. Stassun (1

arxiv:1308.4728 v1 · 2013-08-21 · 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	2026-05-18T01:48:04.871838Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a19daca7d673ae3ef190e7cee5343c3c75752fd57af6371f83b738d3c297d1f0

Aliases

arxiv: 1308.4728 · arxiv_version: 1308.4728v1 · doi: 10.48550/arxiv.1308.4728 · pith_short_12: UGO2ZJ6WOOXD · pith_short_16: UGO2ZJ6WOOXD54MQ · pith_short_8: UGO2ZJ6W

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/UGO2ZJ6WOOXD54MQ47HOKNB4HR \
  | 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: a19daca7d673ae3ef190e7cee5343c3c75752fd57af6371f83b738d3c297d1f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40042f821825986e213bafd8e0f93e6ffb3ead5a2bd30726fddb1d00b847df3f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-08-21T22:23:48Z",
    "title_canon_sha256": "7bfc9a12329fa433b532a7bcecd65e28bd060c4ce02a83024229954d7c2b2189"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.4728",
    "kind": "arxiv",
    "version": 1
  }
}