Pith Number

pith:IRWK6PTQ

pith:2012:IRWK6PTQFU4DJCSJYHT27RQ5TZ

not attested not anchored not stored refs pending

Two-Component Structure of the Hbeta Broad-Line Region in Quasars. I. Evidence from Spectral Principal Component Analysis

2), (2) National Astronomical Observatories, (3) Carnegie Observatories, (4) University of Kentucky, (5) Michigan State University, Chen Hu (1), China, Gary J. Ferland (4), Jack A. Baldwin (5), Jian-Min Wang (1, Luis C. Ho (3), USA, USA), Ye Wang (4) ((1) Institute of High Energy Physics

arxiv:1210.4187 v1 · 2012-10-15 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IRWK6PTQFU4DJCSJYHT27RQ5TZ}

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	2026-05-18T01:53:54.789707Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

446caf3e702d38348a49c1e7afc61d9e461d227b5e7a1a073f3f7b7d674cc885

Aliases

arxiv: 1210.4187 · arxiv_version: 1210.4187v1 · doi: 10.48550/arxiv.1210.4187 · pith_short_12: IRWK6PTQFU4D · pith_short_16: IRWK6PTQFU4DJCSJ · pith_short_8: IRWK6PTQ

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/IRWK6PTQFU4DJCSJYHT27RQ5TZ \
  | 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: 446caf3e702d38348a49c1e7afc61d9e461d227b5e7a1a073f3f7b7d674cc885

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7b8441d8628a40dbbc0f6d87099ba3236e1342a594e1a1a71469afc194b5aacb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-10-15T20:25:17Z",
    "title_canon_sha256": "89fdb08dd49b89e92053ca40489606fdda349311882555f32b28bf8f4a0c510e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.4187",
    "kind": "arxiv",
    "version": 1
  }
}