Pith Number

pith:FBE2VJPR

pith:2014:FBE2VJPR2WS4LWTUUJ36QDYP2D

not attested not anchored not stored refs pending

The Most Massive Active Black-Holes at z~1.5-3.5 Have High Spins and Radiative Efficiencies

Benny Trakhtenbrot

arxiv:1405.5877 v2 · 2014-05-22 · astro-ph.GA · 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{FBE2VJPR2WS4LWTUUJ36QDYP2D}

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	2026-05-18T02:49:38.420439Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2849aaa5f1d5a5c5da74a277e80f0fd0e5dc637c52bb79bfb585fe07a91578d9

Aliases

arxiv: 1405.5877 · arxiv_version: 1405.5877v2 · doi: 10.48550/arxiv.1405.5877 · pith_short_12: FBE2VJPR2WS4 · pith_short_16: FBE2VJPR2WS4LWTU · pith_short_8: FBE2VJPR

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/FBE2VJPR2WS4LWTUUJ36QDYP2D \
  | 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: 2849aaa5f1d5a5c5da74a277e80f0fd0e5dc637c52bb79bfb585fe07a91578d9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c59a5c9a8399c29eac349bef58ff891f1bcc9c3024714d6f26949875cde6c6af",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2014-05-22T20:00:06Z",
    "title_canon_sha256": "72bf70cc29985900776a6d7a2057ef8e55e3ec2d62022bdeb151e249946ffc7e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.5877",
    "kind": "arxiv",
    "version": 2
  }
}