Pith Number

pith:42ZPSGOU

pith:2013:42ZPSGOUZQAQZ5TXNGB2RPUZDL

not attested not anchored not stored refs pending

Are Narrow Line Seyfert 1s a special class of Active Galactic Nuclei?

2), A. Eckart (1, C. Iserlohe (1), C. Straubmeier (1). ((1) I. Physikalisches Institut, G. Busch (1), J. Zuther (1), L. Moser (1), M. Bremer (1), M. Garcia-Marin (1), M. Horrobin (1), M. Valencia-S.(1, M. Vitale (1, S. Fischer (1), S. Smajic (1, University of Cologne. (2) Max-Planck-Institut fuer Radioastronomie), Y.E. Rashed (1)

arxiv:1305.3273 v2 · 2013-05-14 · 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{42ZPSGOUZQAQZ5TXNGB2RPUZDL}

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	2026-05-18T03:15:43.132649Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e6b2f919d4cc010cf6776983a8be991ade94b5a588c8755f20f2e4bbe39c4f1c

Aliases

arxiv: 1305.3273 · arxiv_version: 1305.3273v2 · doi: 10.48550/arxiv.1305.3273 · pith_short_12: 42ZPSGOUZQAQ · pith_short_16: 42ZPSGOUZQAQZ5TX · pith_short_8: 42ZPSGOU

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/42ZPSGOUZQAQZ5TXNGB2RPUZDL \
  | 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: e6b2f919d4cc010cf6776983a8be991ade94b5a588c8755f20f2e4bbe39c4f1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42839dcd1cd4a1eb899dd7fd5243730f97cfef647c75a994480049645808f93c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-05-14T20:00:02Z",
    "title_canon_sha256": "0fbed829e8363affb26fc02258741d57d4e77013e0d176b6ceaf7f31093f40b1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.3273",
    "kind": "arxiv",
    "version": 2
  }
}