Pith Number

pith:XNFTQR2A

pith:2004:XNFTQR2ABBRK45NBYBTU2ZRL7L

not attested not anchored not stored refs pending

Narrow Iron K$\alpha$ Lines in Active Galactic Nuclei: Evolving Populations?

Beijing), Beijing) & Jian-Min Wang (IHEP, Xin-Lin Zhou (IHEP

arxiv:astro-ph/0412075 v1 · 2004-12-03 · 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{XNFTQR2ABBRK45NBYBTU2ZRL7L}

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	2026-07-04T16:45:20.822970Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb4b3847400862ae75a1c0674d662bfaecff48e19fd52d5298843c491a47cf1b

Aliases

arxiv: astro-ph/0412075 · arxiv_version: astro-ph/0412075v1 · doi: 10.48550/arxiv.astro-ph/0412075 · pith_short_12: XNFTQR2ABBRK · pith_short_16: XNFTQR2ABBRK45NB · pith_short_8: XNFTQR2A

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/XNFTQR2ABBRK45NBYBTU2ZRL7L \
  | 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: bb4b3847400862ae75a1c0674d662bfaecff48e19fd52d5298843c491a47cf1b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b847349c82cd32e852942b8e1aa2fb659150db51cdfac09509f7fc95950c76ce",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-12-03T02:07:31Z",
    "title_canon_sha256": "18e48b56f5637825ab672672f3d426f21ff2cc8d26567d545bec4d26b671bc1f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0412075",
    "kind": "arxiv",
    "version": 1
  }
}