Pith Number

pith:UKKQJQI4

pith:2009:UKKQJQI4BDCPEPG2UJQT3F4NF2

not attested not anchored not stored refs pending

An intermediate black hole spin in the NLS1 galaxy SWIFT J2127.4+5654: chaotic accretion or spin energy extraction?

A.C. Fabian (3), A. De Rosa (2), A. Malizia (4), Bologna; (5) IASF/INAF, Cambridge; (4) IASF/INAF, F. Panessa (2), G. Miniutti (1), J.M. Miller (6), Madrid; (2) IASF/INAF, Milano; (6) Univ. of Michigan; (7) Univ. of Leicester), M. Molina (5), Roma; (3) IoA, S. Vaughan (7) ((1) CAB

arxiv:0905.2891 v1 · 2009-05-18 · astro-ph.HE · 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{UKKQJQI4BDCPEPG2UJQT3F4NF2}

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	2026-05-18T02:13:38.876590Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a29504c11c08c4f23cdaa2613d978d2ea3f31119fe464867402ae3e752c2dce9

Aliases

arxiv: 0905.2891 · arxiv_version: 0905.2891v1 · doi: 10.48550/arxiv.0905.2891 · pith_short_12: UKKQJQI4BDCP · pith_short_16: UKKQJQI4BDCPEPG2 · pith_short_8: UKKQJQI4

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/UKKQJQI4BDCPEPG2UJQT3F4NF2 \
  | 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: a29504c11c08c4f23cdaa2613d978d2ea3f31119fe464867402ae3e752c2dce9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b60a4dbf7186692132019aa13467d1230988754b413680b75b3e6777ace4bf4e",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-05-18T14:12:19Z",
    "title_canon_sha256": "610ee33696284e030f1cb5046042a7f073fc4a4f864ed0f1d0f44595632887aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.2891",
    "kind": "arxiv",
    "version": 1
  }
}