Pith Number

pith:SMEEDYXK

pith:2002:SMEEDYXKY7Y5YP4EMIFKP2YQO5

not attested not anchored not stored refs pending

Is There a Metallicity--Luminosity Relationship in AGN? The Case of Narrow-Line Seyfert 1 Galaxies

Hagai Netzer (Tel-Aviv University), Ohad Shemmer

arxiv:astro-ph/0201437 v2 · 2002-01-27 · 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{SMEEDYXKY7Y5YP4EMIFKP2YQO5}

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	2026-07-04T16:29:18.969120Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

930841e2eac7f1dc3f84620aa7eb10776190886f0962f746aba8744102a6d619

Aliases

arxiv: astro-ph/0201437 · arxiv_version: astro-ph/0201437v2 · doi: 10.48550/arxiv.astro-ph/0201437 · pith_short_12: SMEEDYXKY7Y5 · pith_short_16: SMEEDYXKY7Y5YP4E · pith_short_8: SMEEDYXK

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/SMEEDYXKY7Y5YP4EMIFKP2YQO5 \
  | 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: 930841e2eac7f1dc3f84620aa7eb10776190886f0962f746aba8744102a6d619

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5a60c107bf8ad3edc06c06e721e976bade7eaaf5d0129aa2905b7f9c8e8c3607",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-01-27T06:57:12Z",
    "title_canon_sha256": "8c825d98e865e2893c28d3c8a17f00302c54a29e6db50638ed619217ff869dd9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0201437",
    "kind": "arxiv",
    "version": 2
  }
}