Pith Number

pith:IKECNHA4

pith:2012:IKECNHA4VEBA7Y6HINSN7PFCXE

not attested not anchored not stored refs pending

The most extreme ultraluminous X-ray sources: evidence for intermediate-mass black holes?

(2) University of Cambridge, (3) University of Alberta, (4) University of Leicester), Amy E. Scott (4) ((1) University of Durham, Andrew D. Sutton (1), Dominic J. Walton (2), Jeanette C. Gladstone (3), Timothy P. Roberts (1)

arxiv:1203.4100 v1 · 2012-03-19 · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IKECNHA4VEBA7Y6HINSN7PFCXE}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:58:06.193970Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4288269c1ca9020fe3c74364dfbca2b93fb6c009102c25332acbefb6b99559d0

Aliases

arxiv: 1203.4100 · arxiv_version: 1203.4100v1 · doi: 10.48550/arxiv.1203.4100 · pith_short_12: IKECNHA4VEBA · pith_short_16: IKECNHA4VEBA7Y6H · pith_short_8: IKECNHA4

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/IKECNHA4VEBA7Y6HINSN7PFCXE \
  | 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: 4288269c1ca9020fe3c74364dfbca2b93fb6c009102c25332acbefb6b99559d0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab65a5058d6c44adafcace6965f09cbeb82bade9a7b0277c2c0a2e0595d228cf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-03-19T13:10:08Z",
    "title_canon_sha256": "aa689a1dc49353df11528546c7bf185b763154ea86764a4ac57ddf87e108e327"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.4100",
    "kind": "arxiv",
    "version": 1
  }
}