Pith Number

pith:Z5GNLRZV

pith:2009:Z5GNLRZVBXDRHSIFJRYNOPRWCQ

not attested not anchored not stored refs pending

An extensive photometric study of the Blazhko RR Lyrae star DM Cyg

A. Sodor, B. Belucz, B. Szeidl, E. Kun, G. Hajdu, I. Dekany, I. Nagy, J. Jurcsik, K. Posztobanyi, K. Vida, M. Varadi, Zs. Hurta, Zs. Kovari

arxiv:0904.4129 v1 · 2009-04-27 · 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{Z5GNLRZVBXDRHSIFJRYNOPRWCQ}

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	2026-05-18T02:13:57.143982Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf4cd5c7350dc713c9054c70d73e3614286c8916b9444aa8518216fb32c8827a

Aliases

arxiv: 0904.4129 · arxiv_version: 0904.4129v1 · doi: 10.48550/arxiv.0904.4129 · pith_short_12: Z5GNLRZVBXDR · pith_short_16: Z5GNLRZVBXDRHSIF · pith_short_8: Z5GNLRZV

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/Z5GNLRZVBXDRHSIFJRYNOPRWCQ \
  | 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: cf4cd5c7350dc713c9054c70d73e3614286c8916b9444aa8518216fb32c8827a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7de213dcd993b51af01333d1dc1452cf84bbe78c2c331d9e02fc9423ee880472",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-04-27T11:04:44Z",
    "title_canon_sha256": "7cc791e4895ab081a73551689603d3d0d38550af51676132d648c63c3e137dad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4129",
    "kind": "arxiv",
    "version": 1
  }
}