Pith Number

pith:6HPUZ4YQ

pith:2011:6HPUZ4YQ32BHPPNV35UV6KW233

not attested not anchored not stored refs pending

The elusive radio loud Seyfert 2 galaxy NGC 2110

(2) AIM CEA/Saclay), APC, Olivier Do Cao (2) ((1) Francois Arago Centre, Volker Beckmann (1)

arxiv:1102.4974 v2 · 2011-02-24 · astro-ph.CO · 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{6HPUZ4YQ32BHPPNV35UV6KW233}

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	2026-05-18T04:27:56.252554Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f1df4cf310de8277bdb5df695f2adadefc120934ebefc636136baa0c1718a065

Aliases

arxiv: 1102.4974 · arxiv_version: 1102.4974v2 · doi: 10.48550/arxiv.1102.4974 · pith_short_12: 6HPUZ4YQ32BH · pith_short_16: 6HPUZ4YQ32BHPPNV · pith_short_8: 6HPUZ4YQ

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/6HPUZ4YQ32BHPPNV35UV6KW233 \
  | 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: f1df4cf310de8277bdb5df695f2adadefc120934ebefc636136baa0c1718a065

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4b94a0afa18a3d70f5617813b9fb0d2d58a7b154cb7c0d3678f67c9a85f14d5",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-02-24T12:35:14Z",
    "title_canon_sha256": "ed3e5bc2bc58a25032af4a2957dce79a95b0175daaef29ca2f6574d1b518b7f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.4974",
    "kind": "arxiv",
    "version": 2
  }
}