Pith Number

pith:7CEUSMDB

pith:2018:7CEUSMDBPHCXFXHHGGZOTXT2JT

not attested not anchored not stored refs pending

New Cepheid variables in the young open clusters Berkeley 51 and Berkeley 55

(2) Dpto. de F\'isica, (3) Faulkes Telescope Project, 4), (4) Astrophysics Research Institute, Astronomy, Cardiff University, Carretera San Vicente del Raspeig s/n, Escuela Polit\'ecnica Superior, F. Lewis (3, H. M. Tabernero (2), I. Negueruela (2), Ingenier\'ia de Sistemas y Teor\'ia de la Se\~nal, J. S. Clark (1), Liverpool John Moores University), M. E. Lohr (1), P. Roche (3) ((1) School of Physical Sciences, School of Physics, The Open University, The Parade, Universidad de Alicante, Walton Hall

arxiv:1805.05663 v2 · 2018-05-15 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7CEUSMDBPHCXFXHHGGZOTXT2JT}

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	2026-05-18T00:15:13.195426Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f88949306179c572dce731b2e9de7a4ccf3f7c63f95f35ac94aaeb563d7c9154

Aliases

arxiv: 1805.05663 · arxiv_version: 1805.05663v2 · doi: 10.48550/arxiv.1805.05663 · pith_short_12: 7CEUSMDBPHCX · pith_short_16: 7CEUSMDBPHCXFXHH · pith_short_8: 7CEUSMDB

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/7CEUSMDBPHCXFXHHGGZOTXT2JT \
  | 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: f88949306179c572dce731b2e9de7a4ccf3f7c63f95f35ac94aaeb563d7c9154

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3cabff68a8deeeaecab5f0b1b88695b1bdc4460154c19d67427c481f2a4ff54a",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-05-15T09:33:17Z",
    "title_canon_sha256": "d4c9a068ec39bce055909daa482b4ca7597a3e8cbe7b0e465b0338774022aabc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.05663",
    "kind": "arxiv",
    "version": 2
  }
}