Pith Number

pith:5NSDFQZX

pith:2002:5NSDFQZX4ZY53GSEPCSQTOFLWF

not attested not anchored not stored refs pending

The Discovery of Time Variability in OH Megamasers

Jeremy Darling, Riccardo Giovanelli (Cornell University)

arxiv:astro-ph/0204067 v1 · 2002-04-03 · 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{5NSDFQZX4ZY53GSEPCSQTOFLWF}

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	2026-07-04T16:29:38.879754Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eb6432c337e671dd9a4478a509b8abb14702292ed3024f4e450bcc592c70f4ce

Aliases

arxiv: astro-ph/0204067 · arxiv_version: astro-ph/0204067v1 · doi: 10.48550/arxiv.astro-ph/0204067 · pith_short_12: 5NSDFQZX4ZY5 · pith_short_16: 5NSDFQZX4ZY53GSE · pith_short_8: 5NSDFQZX

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/5NSDFQZX4ZY53GSEPCSQTOFLWF \
  | 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: eb6432c337e671dd9a4478a509b8abb14702292ed3024f4e450bcc592c70f4ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2330cf43c29c2a381ff0c7c0311f8619d70d8e4d1c3ded2789e86208e120b84a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-04-03T22:10:32Z",
    "title_canon_sha256": "dd7eb53e5abc37635d184cfc9a33288aeaed42b3aa6fb46a322f86e3cfaac22d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0204067",
    "kind": "arxiv",
    "version": 1
  }
}