Pith Number

pith:HU4QIVJU

pith:2013:HU4QIVJURQFLULQLCDLNR6BGR7

not attested not anchored not stored refs pending

Optical counterparts of the nearest ultraluminous X-ray sources

(2) Liverpool John Moores University, (3) University of Durham, 4), (4) International Space University, (5) University of Warwick, (6) University of Leicester.), Andrew J. Levan (5), Chris Copperwheat (2), Craig O. Heinke (1), Jeanette C. Gladstone (1), Mike R. Goad (6). ((1) University of Alberta, Taylor F. Cartwright (1, Timothy P. Roberts (3)

arxiv:1303.1213 v1 · 2013-03-05 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HU4QIVJURQFLULQLCDLNR6BGR7}

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	2026-05-18T01:51:16.499422Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3d390455348c0aba2e0b10d6d8f8268feffcc78a4aeb28181a6c49bdffc78ca5

Aliases

arxiv: 1303.1213 · arxiv_version: 1303.1213v1 · doi: 10.48550/arxiv.1303.1213 · pith_short_12: HU4QIVJURQFL · pith_short_16: HU4QIVJURQFLULQL · pith_short_8: HU4QIVJU

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/HU4QIVJURQFLULQLCDLNR6BGR7 \
  | 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: 3d390455348c0aba2e0b10d6d8f8268feffcc78a4aeb28181a6c49bdffc78ca5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dd8cd5c738827fc0b2e004596263d05cbfaab6e526ed3d6330ac9a901c5f6d81",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-03-05T22:39:59Z",
    "title_canon_sha256": "94b25c1476d6404f83ad09bf65b792362b3f155dda1ad404da04ceb1c293dd60"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.1213",
    "kind": "arxiv",
    "version": 1
  }
}