Pith Number

pith:Y44T7CTL

pith:1997:Y44T7CTLNZVZSPZUVVKRY6EGPF

not attested not anchored not stored refs pending

Interpretation of the emission line spectra of Seyfert 2 galaxies by multi-component photoionization models

Hartmut Schulz (Ruhr-Univ. Bochum), Ruhr-Univ. Bochum), Stefanie Komossa (MPE Garching

arxiv:astro-ph/9701001 v1 · 1997-01-01 · 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{Y44T7CTLNZVZSPZUVVKRY6EGPF}

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	2026-05-18T01:07:40.363254Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c7393f8a6b6e6b993f34ad551c788679699de55137a7b208cd5809bfbda41734

Aliases

arxiv: astro-ph/9701001 · arxiv_version: astro-ph/9701001v1 · doi: 10.48550/arxiv.astro-ph/9701001 · pith_short_12: Y44T7CTLNZVZ · pith_short_16: Y44T7CTLNZVZSPZU · pith_short_8: Y44T7CTL

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/Y44T7CTLNZVZSPZUVVKRY6EGPF \
  | 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: c7393f8a6b6e6b993f34ad551c788679699de55137a7b208cd5809bfbda41734

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9eca4b0fb83d49c55db960da1b8322d1729d66dad29e2baec354b28c26f6c5b8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-01-01T11:21:47Z",
    "title_canon_sha256": "90a4f9c12c8479ba03290001bfc6c1427f6f2ea426630e4e56aed8451a60412b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9701001",
    "kind": "arxiv",
    "version": 1
  }
}