Pith Number

pith:WSQMKUMM

pith:2001:WSQMKUMMQJR64KELGCOVK2ADM7

not attested not anchored not stored refs pending

Ultraluminous X-Ray Sources in External Galaxies

(2) Harvard-Smithsonian Center for Astrophysics), A.R. King (1), G. Fabbiano (2), M.B. Davies (1), M. Elvis (2) ((1) University of Leicester, M.J. Ward (1)

arxiv:astro-ph/0104333 v1 · 2001-04-20 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WSQMKUMMQJR64KELGCOVK2ADM7}

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	2026-07-04T16:23:15.667012Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4a0c5518c8263ee288b309d55680367f1ec3646d2578e916b913ad7ba23837d

Aliases

arxiv: astro-ph/0104333 · arxiv_version: astro-ph/0104333v1 · doi: 10.48550/arxiv.astro-ph/0104333 · pith_short_12: WSQMKUMMQJR6 · pith_short_16: WSQMKUMMQJR64KEL · pith_short_8: WSQMKUMM

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/WSQMKUMMQJR64KELGCOVK2ADM7 \
  | 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: b4a0c5518c8263ee288b309d55680367f1ec3646d2578e916b913ad7ba23837d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "170981ab77e437192ffa025781a0a3abcb02b62151854fca28e64b3169cc93cf",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-04-20T12:05:59Z",
    "title_canon_sha256": "d3503b8ae03b2f5d18d084ec36526e3e31c7cfa54869649c9c9f4db76a457eb3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0104333",
    "kind": "arxiv",
    "version": 1
  }
}