Pith Number

pith:GIQBEOUG

pith:2012:GIQBEOUG47EICTV76DDOCNNXEE

not attested not anchored not stored refs pending

Discovery of an active supermassive black hole in the bulge-less galaxy NGC 4561

C.Araya Salvo, F. Fiore, H. Ghosh, L. Ferrarese, S. Mathur

arxiv:1209.1354 v1 · 2012-09-06 · 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{GIQBEOUG47EICTV76DDOCNNXEE}

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	2026-05-18T01:54:39.183123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3220123a86e7c8814ebff0c6e135b72123360a1582c8a5cf1ec14717c41a8c54

Aliases

arxiv: 1209.1354 · arxiv_version: 1209.1354v1 · doi: 10.48550/arxiv.1209.1354 · pith_short_12: GIQBEOUG47EI · pith_short_16: GIQBEOUG47EICTV7 · pith_short_8: GIQBEOUG

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/GIQBEOUG47EICTV76DDOCNNXEE \
  | 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: 3220123a86e7c8814ebff0c6e135b72123360a1582c8a5cf1ec14717c41a8c54

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e15db9a55b985c178953b76079db2e4bb0bbdc7496acafd47747f37c24438095",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-09-06T17:58:44Z",
    "title_canon_sha256": "6c1968db72150ff7c975c02158754eed772b789b5a46e3ed1211a13f52ed4848"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.1354",
    "kind": "arxiv",
    "version": 1
  }
}