Pith Number

pith:CFYORDND

pith:2006:CFYORDNDMXCQEMUE4CQN4D5NAM

not attested not anchored not stored refs pending

Gravitationally Lensed QSOs: Optical Monitoring with the EOCA and the Liverpool Telescope (LT)

A. Ullan (Univ. Cantabria, Australia), E. Koptelova (Moscow Univ., J. E. Ovaldsen (Univ. Oslo, L. J. Goicoechea, Norway), R. Gil-Merino (Univ. Sydney, Russia), Spain), Ukraine), V. N. Shalyapin (NAS

arxiv:astro-ph/0609647 v1 · 2006-09-23 · 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{CFYORDNDMXCQEMUE4CQN4D5NAM}

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	2026-07-04T14:56:22.633479Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1170e88da365c5023284e0a0de0fad033cd8fabe819ca4c1ffc791b38e308354

Aliases

arxiv: astro-ph/0609647 · arxiv_version: astro-ph/0609647v1 · doi: 10.48550/arxiv.astro-ph/0609647 · pith_short_12: CFYORDNDMXCQ · pith_short_16: CFYORDNDMXCQEMUE · pith_short_8: CFYORDND

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/CFYORDNDMXCQEMUE4CQN4D5NAM \
  | 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: 1170e88da365c5023284e0a0de0fad033cd8fabe819ca4c1ffc791b38e308354

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94037bc1cfb4735897bcf164a185c177f02bad820a31e1856d53cf27690c493c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-09-23T17:11:42Z",
    "title_canon_sha256": "7e519ec10054a8f0eefbc2e02452873fbc4dc74bda1f316640a6a259416f8547"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0609647",
    "kind": "arxiv",
    "version": 1
  }
}