Pith Number

pith:KPBJDEUK

pith:2007:KPBJDEUKSMHPZ3IY66R5GPL7QZ

not attested not anchored not stored refs pending

The Optical Gravitational Lensing Experiment. OGLE-III Long Term Monitoring of the Gravitational Lens QSO 2237+0305

A. Udalski, G. Pietrzynski, I. Soszynski, K. Ulaczyk, K. Zebrun, L. Wyrzykowski, M.K. Szymanski, M. Kubiak, O. Szewczyk, T. Wieckowski

arxiv:astro-ph/0701300 v1 · 2007-01-10 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KPBJDEUKSMHPZ3IY66R5GPL7QZ}

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	2026-07-04T15:16:30.331966Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53c291928a930efced18f7a3d33d7f8652ef1d38272c5e4b126898867a2a7962

Aliases

arxiv: astro-ph/0701300 · arxiv_version: astro-ph/0701300v1 · doi: 10.48550/arxiv.astro-ph/0701300 · pith_short_12: KPBJDEUKSMHP · pith_short_16: KPBJDEUKSMHPZ3IY · pith_short_8: KPBJDEUK

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/KPBJDEUKSMHPZ3IY66R5GPL7QZ \
  | 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: 53c291928a930efced18f7a3d33d7f8652ef1d38272c5e4b126898867a2a7962

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7298ff885e33b11bdce352d71d5f86d04e3991945aa424c826c296511a29af38",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-01-10T14:57:16Z",
    "title_canon_sha256": "b49534471f4abcf342bf299c4bcd47846e19685a810ead96e27257bd166852b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0701300",
    "kind": "arxiv",
    "version": 1
  }
}