Pith Number

pith:PV2PLVPF

pith:2019:PV2PLVPFA4WUOZZEM6DYDZYVNK

not attested not anchored not stored refs pending

Secular period variations of RR Lyrae stars in NGC 4147

Alonso Luna (1), Armando Arellano Ferro (1) ((1) Instituto de Astronom\'ia, M\'exico.), Universidad Nacional Aut\'onoma de M\'exico

arxiv:1901.01305 v1 · 2019-01-04 · 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{PV2PLVPFA4WUOZZEM6DYDZYVNK}

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	2026-05-17T23:48:31.002430Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d74f5d5e5072d476724678781e7156aa82edcbda88efb9ea752c1ecf3fe22fc

Aliases

arxiv: 1901.01305 · arxiv_version: 1901.01305v1 · doi: 10.48550/arxiv.1901.01305 · pith_short_12: PV2PLVPFA4WU · pith_short_16: PV2PLVPFA4WUOZZE · pith_short_8: PV2PLVPF

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/PV2PLVPFA4WUOZZEM6DYDZYVNK \
  | 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: 7d74f5d5e5072d476724678781e7156aa82edcbda88efb9ea752c1ecf3fe22fc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "06c796bc36eb64a99ca40ddc15ab85703bb97f380b2d431b3b98141e115d8743",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-01-04T20:39:53Z",
    "title_canon_sha256": "6480749c0bbada609b3b9d38fae55fdfd45c2466dfcfe58ae0ef79511ed14d2f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.01305",
    "kind": "arxiv",
    "version": 1
  }
}