Pith Number

pith:PMRFVG2Z

pith:2001:PMRFVG2ZMAYXFHVZMMCJ2TEEDA

not attested not anchored not stored refs pending

Variability of Active Galactic Nuclei

Bradley M. Peterson

arxiv:astro-ph/0109495 v1 · 2001-09-26 · 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{PMRFVG2ZMAYXFHVZMMCJ2TEEDA}

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	2026-05-18T01:00:27.534807Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b225a9b596031729eb963049d4c84183243f30a39b2284538741a66845643d6

Aliases

arxiv: astro-ph/0109495 · arxiv_version: astro-ph/0109495v1 · doi: 10.48550/arxiv.astro-ph/0109495 · pith_short_12: PMRFVG2ZMAYX · pith_short_16: PMRFVG2ZMAYXFHVZ · pith_short_8: PMRFVG2Z

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/PMRFVG2ZMAYXFHVZMMCJ2TEEDA \
  | 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: 7b225a9b596031729eb963049d4c84183243f30a39b2284538741a66845643d6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "086954f93a242b72082f7d7371f7178aede8b7577ecd96cb83413dc9929fd930",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-09-26T22:12:37Z",
    "title_canon_sha256": "89f1e0606d71060563e11ede398e83da4b8c6e5b7c687adf53eb112d3e60e410"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0109495",
    "kind": "arxiv",
    "version": 1
  }
}