Pith Number

pith:4KZUMMYV

pith:2018:4KZUMMYVZDZWLQGPFOLASGRBQ6

not attested not anchored not stored refs pending

The OGLE Collection of Variable Stars. Type II Cepheids in the Magellanic System

A. Udalski, D. Skowron, I. Iwanek, I. Soszy\'nski, J. Skowron, K. Rybicki, K. Ulaczyk, {\L}. Wyrzykowski, M. K. Szyma\'nski, P. Mr\'oz, P. Pietrukowicz, R. Poleski, S. Koz{\l}owski

arxiv:1807.00008 v1 · 2018-06-29 · 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{4KZUMMYVZDZWLQGPFOLASGRBQ6}

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	2026-05-18T00:02:34.010006Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e2b3463315c8f365c0cf2b96091a2187bc8e9d0fa7c9519c33dfcfa1bccdac88

Aliases

arxiv: 1807.00008 · arxiv_version: 1807.00008v1 · doi: 10.48550/arxiv.1807.00008 · pith_short_12: 4KZUMMYVZDZW · pith_short_16: 4KZUMMYVZDZWLQGP · pith_short_8: 4KZUMMYV

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/4KZUMMYVZDZWLQGPFOLASGRBQ6 \
  | 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: e2b3463315c8f365c0cf2b96091a2187bc8e9d0fa7c9519c33dfcfa1bccdac88

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f8d6f44cc148c37450e6ea0a9064a932e46de58806ca72f149205fdbe9e1ed3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-06-29T18:00:02Z",
    "title_canon_sha256": "75d4c67a7ad4328d76607ecb6d0feaae462bea981c12c8de33e7a2a0d60b12e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.00008",
    "kind": "arxiv",
    "version": 1
  }
}