Pith Number

pith:XQK2HWUO

pith:2016:XQK2HWUODIVBCZN7SW7VPYDCTA

not attested not anchored not stored refs pending

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

A. Udalski, D. Skowron, G. Pietrzynski, I. Soszynski, J. Skowron, K. Ulaczyk, L. Wyrzykowski, M. K. Szymanski, M. Pawlak, P. Mroz, P. Pietrukowicz, R. Poleski, S. Kozlowski

arxiv:1601.01318 v2 · 2016-01-06 · 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{XQK2HWUODIVBCZN7SW7VPYDCTA}

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	2026-05-18T01:22:16.342801Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc15a3da8e1a2a1165bf95bf57e062982628e6740bc7f3ee8cf3af8bbd88d1b8

Aliases

arxiv: 1601.01318 · arxiv_version: 1601.01318v2 · doi: 10.48550/arxiv.1601.01318 · pith_short_12: XQK2HWUODIVB · pith_short_16: XQK2HWUODIVBCZN7 · pith_short_8: XQK2HWUO

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/XQK2HWUODIVBCZN7SW7VPYDCTA \
  | 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: bc15a3da8e1a2a1165bf95bf57e062982628e6740bc7f3ee8cf3af8bbd88d1b8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5255e03819b72867b6f0070780d098838e9f15a3f5d3f19d228fb44160ec5b56",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-01-06T21:00:02Z",
    "title_canon_sha256": "1e805f683a3898e153f34a351446ad048cb4e2bdd029c5f0cd6fe97d58a3bcd7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.01318",
    "kind": "arxiv",
    "version": 2
  }
}