Pith Number

pith:W2OZ23GS

pith:1999:W2OZ23GSJZZHVZDWBTJP2JPEEV

not attested not anchored not stored refs pending

A Possible 100-day X-ray-to-Optical Lag in the Variations of the Seyfert 1 Nucleus NGC 3516

Dan Maoz (Tel-Aviv U.), Kirpal Nandra (NASA/Goddard), Leicester U.), Rick Edelson (UCLA

arxiv:astro-ph/9910023 v1 · 1999-10-01 · 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{W2OZ23GSJZZHVZDWBTJP2JPEEV}

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

PKS 2155-304: Long-Term Optical Photometric Monitoring and Variability Analysis

Receipt and verification

First computed	2026-07-04T16:11:39.954889Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b69d9d6cd24e727ae4760cd2fd25e4256d124ac8d2afa2109f32dbdecd4676f3

Aliases

arxiv: astro-ph/9910023 · arxiv_version: astro-ph/9910023v1 · doi: 10.48550/arxiv.astro-ph/9910023 · pith_short_12: W2OZ23GSJZZH · pith_short_16: W2OZ23GSJZZHVZDW · pith_short_8: W2OZ23GS

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/W2OZ23GSJZZHVZDWBTJP2JPEEV \
  | 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: b69d9d6cd24e727ae4760cd2fd25e4256d124ac8d2afa2109f32dbdecd4676f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "45a25a36dd148b3a5e9dbce8a53610a19384417956a0686d1df8ee7448bf3f8d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-10-01T22:03:16Z",
    "title_canon_sha256": "bc0ca621a4615d4a3c9d7917cfe956789f608d5fb5227227bf4135e831b0b4d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9910023",
    "kind": "arxiv",
    "version": 1
  }
}