Pith Number

pith:UX73WIGR

pith:2009:UX73WIGRSXVSS3J25PIN27D63W

not attested not anchored not stored refs pending

V440 Per: the longest period overtone Cepheid

A. Rozek, A. Schwarzenberg-Czerny, K. Kaminski, M. Fagas, P. Bartczak, P. Moskalik, R. Baranowski, R. Ratajczak, R. Smolec, T. Kwiatkowski, W. Borczyk, W. Dimitrov

arxiv:0904.0600 v1 · 2009-04-03 · astro-ph.SR · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UX73WIGRSXVSS3J25PIN27D63W}

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	2026-05-18T02:34:59.955972Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a5ffbb20d195eb296d3aebd0dd7c7edda68cc3dd9ba092670534ba584b227616

Aliases

arxiv: 0904.0600 · arxiv_version: 0904.0600v1 · doi: 10.48550/arxiv.0904.0600 · pith_short_12: UX73WIGRSXVS · pith_short_16: UX73WIGRSXVSS3J2 · pith_short_8: UX73WIGR

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/UX73WIGRSXVSS3J25PIN27D63W \
  | 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: a5ffbb20d195eb296d3aebd0dd7c7edda68cc3dd9ba092670534ba584b227616

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17de269cd90e78dce656df00f0102ed581abb1495667d9bd2adce691a2a38a12",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-04-03T15:46:33Z",
    "title_canon_sha256": "681944585b0bde4793f5b2b24548230f33f1af24f0c171d4b5f118805bb28a8b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.0600",
    "kind": "arxiv",
    "version": 1
  }
}