Pith Number

pith:3S2F4OVT

pith:2002:3S2F4OVTRTHUMY7VGZZALZVKZC

not attested not anchored not stored refs pending

Gas Metallicity of Narrow-Line Regions in Narrow-Line Seyfert 1 Galaxies and Broad-Line Seyfert 1 Galaxies

Takashi Murayama, Tohru Nagao, Yasuhiro Shioya, Yoshiaki Taniguchi (Tohoku University)

arxiv:astro-ph/0204171 v1 · 2002-04-10 · 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{3S2F4OVTRTHUMY7VGZZALZVKZC}

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	2026-07-04T16:29:40.860418Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dcb45e3ab38ccf4663f5367205e6aac89051a2179a6435c8c85d95d9e6fcb221

Aliases

arxiv: astro-ph/0204171 · arxiv_version: astro-ph/0204171v1 · doi: 10.48550/arxiv.astro-ph/0204171 · pith_short_12: 3S2F4OVTRTHU · pith_short_16: 3S2F4OVTRTHUMY7V · pith_short_8: 3S2F4OVT

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/3S2F4OVTRTHUMY7VGZZALZVKZC \
  | 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: dcb45e3ab38ccf4663f5367205e6aac89051a2179a6435c8c85d95d9e6fcb221

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ebd1d8915d98c5834c508737ff9c1d5ebbd0443287085998c8de5878e481c36",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-04-10T04:30:34Z",
    "title_canon_sha256": "eab5e7a2ddce72158607418cdf8016e7d397cf1375780d2cd01a75b1691d17bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0204171",
    "kind": "arxiv",
    "version": 1
  }
}