Pith Number

pith:OXQUKJ4C

pith:2005:OXQUKJ4CT7YG5XRED5TJTYPV5G

not attested not anchored not stored refs pending

M74 X-1 (CXOU J013651.1+154547): An Extremely Variable Ultraluminous X-Ray Source

2), (2) University of Leicester, 3), (3) MIT Kavli Institute for Astrophysics, A.H. Prestwich (1) ((1) Harvard-Smithsonian Center for Astrophysics, M.I. Krauss (1, M.R. Garcia (1), R.E. Kilgard (1, Space Research), T.P. Roberts (2)

arxiv:astro-ph/0505260 v1 · 2005-05-12 · 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{OXQUKJ4CT7YG5XRED5TJTYPV5G}

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	2026-07-04T16:52:22.280069Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75e14527829ff06ede241f6699e1f5e98ccafe14cf3580180b7a02f3769bd652

Aliases

arxiv: astro-ph/0505260 · arxiv_version: astro-ph/0505260v1 · doi: 10.48550/arxiv.astro-ph/0505260 · pith_short_12: OXQUKJ4CT7YG · pith_short_16: OXQUKJ4CT7YG5XRE · pith_short_8: OXQUKJ4C

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/OXQUKJ4CT7YG5XRED5TJTYPV5G \
  | 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: 75e14527829ff06ede241f6699e1f5e98ccafe14cf3580180b7a02f3769bd652

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b82161f3be7177c60bf6b5cdc23b9e5183b32d9c8c6abd36d1aa3fbf0d1eb221",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-05-12T15:47:50Z",
    "title_canon_sha256": "fff1ea19e3b11c9ec0458c3dc6faa42c3e0763317e5bf274a3393d8fdd72540d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0505260",
    "kind": "arxiv",
    "version": 1
  }
}