Pith Number

pith:ZU6GPHUB

pith:2003:ZU6GPHUBEQJM2N4VY5XLMDDLUJ

not attested not anchored not stored refs pending

Clear Evidence for Intranight Optical Variability in Radio-quiet Quasars

C.S. Stalin, Gopal-Krishna (NCRA/TIFR), Naini Tal), Paul J. Wiita (GSU), Ram Sagar (State Obs

arxiv:astro-ph/0302188 v1 · 2003-02-10 · 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{ZU6GPHUBEQJM2N4VY5XLMDDLUJ}

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.

Cited by

1 paper in Pith

The long-term optical flux variations of Compact Symmetric Objects

Receipt and verification

First computed	2026-07-04T16:36:28.900061Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cd3c679e812412cd3795c76eb60c6ba26b961955f10d567cfb510a638e6cd654

Aliases

arxiv: astro-ph/0302188 · arxiv_version: astro-ph/0302188v1 · doi: 10.48550/arxiv.astro-ph/0302188 · pith_short_12: ZU6GPHUBEQJM · pith_short_16: ZU6GPHUBEQJM2N4V · pith_short_8: ZU6GPHUB

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/ZU6GPHUBEQJM2N4VY5XLMDDLUJ \
  | 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: cd3c679e812412cd3795c76eb60c6ba26b961955f10d567cfb510a638e6cd654

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e838cd27fb0f29678aff8c501b76127204836e8834f96c04f229a57303dcbf9",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-02-10T21:17:22Z",
    "title_canon_sha256": "96db31f1c8bc076a963bee02c32f9614c7d7a5923f30ae2f0bc735f473bd1761"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0302188",
    "kind": "arxiv",
    "version": 1
  }
}