Pith Number

pith:V5ZDME5I

pith:2009:V5ZDME5I3VODETKSPD6HBCVEPX

not attested not anchored not stored refs pending

Reverberation in the UV-Optical Continuum Brightness Fluctuations of MACHO Quasar 13.5962.237

Justin Lovegrove, Pavlos Protopapas, Rudolph E. Schild

arxiv:0902.1160 v1 · 2009-02-06 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{V5ZDME5I3VODETKSPD6HBCVEPX}

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	2026-05-18T04:37:22.775537Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

af723613a8dd5c324d5278fc708aa47de0aab752dbb8d26b4da1fcd30c936958

Aliases

arxiv: 0902.1160 · arxiv_version: 0902.1160v1 · doi: 10.48550/arxiv.0902.1160 · pith_short_12: V5ZDME5I3VOD · pith_short_16: V5ZDME5I3VODETKS · pith_short_8: V5ZDME5I

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/V5ZDME5I3VODETKSPD6HBCVEPX \
  | 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: af723613a8dd5c324d5278fc708aa47de0aab752dbb8d26b4da1fcd30c936958

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5d9ff37e4dd4ad6ad98b9671c65a714d977b72337d303e2e7968e2f9f6da6de",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-02-06T19:21:28Z",
    "title_canon_sha256": "a6ef89a89e3f0696220509c7de6b723f1e2911b382d81d33ae84c998382df22e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.1160",
    "kind": "arxiv",
    "version": 1
  }
}