Pith Number

pith:ZGEFSNMI

pith:2016:ZGEFSNMI3ZWBLERXTKFSHY27ET

not attested not anchored not stored refs pending

The Cepheids of NGC1866: A Precise Benchmark for the Extragalactic Distance Scale and Stellar Evolution from Modern UBVI Photometry

A. R. Walker, D. L. Welch, E. Brocato, G. Coppola, G. Raimondo, I. Musella, M. Marconi, P. B. Stetson, R. Carini, R. Molinaro, V. Ripepi

arxiv:1601.06628 v1 · 2016-01-25 · astro-ph.SR · astro-ph.GA

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	2026-05-18T01:19:24.686959Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c988593588de6c1592379a8b23e35f24f1c1961580895f5e3881979576e73b7a

Aliases

arxiv: 1601.06628 · arxiv_version: 1601.06628v1 · doi: 10.48550/arxiv.1601.06628 · pith_short_12: ZGEFSNMI3ZWB · pith_short_16: ZGEFSNMI3ZWBLERX · pith_short_8: ZGEFSNMI

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/ZGEFSNMI3ZWBLERXTKFSHY27ET \
  | 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: c988593588de6c1592379a8b23e35f24f1c1961580895f5e3881979576e73b7a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "03a8576ad1e5bf373b29439dd75e3087fe176728a013721cae1102302c59fcae",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-01-25T14:55:26Z",
    "title_canon_sha256": "078fc4231eea686ab7be001c56af9d64fe7212917618280eef653eaacf7894a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.06628",
    "kind": "arxiv",
    "version": 1
  }
}