Pith Number

pith:ZC4S32KN

pith:2017:ZC4S32KNVMAISO4EOMRSOYFS5H

not attested not anchored not stored refs pending

On the two main classes of Active Galactic Nuclei

Paolo Padovani (ESO)

arxiv:1707.08069 v1 · 2017-07-25 · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZC4S32KNVMAISO4EOMRSOYFS5H}

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	2026-05-18T00:39:29.537060Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c8b92de94dab00893b8473232760b2e9c292310f76f743790d1cb27e26e64127

Aliases

arxiv: 1707.08069 · arxiv_version: 1707.08069v1 · doi: 10.48550/arxiv.1707.08069 · pith_short_12: ZC4S32KNVMAI · pith_short_16: ZC4S32KNVMAISO4E · pith_short_8: ZC4S32KN

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/ZC4S32KNVMAISO4EOMRSOYFS5H \
  | 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: c8b92de94dab00893b8473232760b2e9c292310f76f743790d1cb27e26e64127

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "690b2e001ceddeebf4d0a8a85d06de7915f590d4c1847530656964724c61201e",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-07-25T16:25:51Z",
    "title_canon_sha256": "4ed2dcd9c64ebab0c9eda0689ec9226dfc255df66ebec9b4e01628dd9b686df8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.08069",
    "kind": "arxiv",
    "version": 1
  }
}