Pith Number

pith:H43B2Q4B

pith:2011:H43B2Q4B7DVR4CYJSW2YGHQXTX

not attested not anchored not stored refs pending

Optical Properties of the Ultraluminous X-ray Source Holmberg IX X-1 and its Stellar Environment

Christian Motch, Fabien Gris\'e, Manfred W. Pakull, Philip Kaaret

arxiv:1104.5523 v1 · 2011-04-28 · 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{H43B2Q4B7DVR4CYJSW2YGHQXTX}

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	2026-05-18T04:20:12.754198Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f361d4381f8eb1e0b0995b5831e179df70806e840b9390ac641f3cbe239f044

Aliases

arxiv: 1104.5523 · arxiv_version: 1104.5523v1 · doi: 10.48550/arxiv.1104.5523 · pith_short_12: H43B2Q4B7DVR · pith_short_16: H43B2Q4B7DVR4CYJ · pith_short_8: H43B2Q4B

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/H43B2Q4B7DVR4CYJSW2YGHQXTX \
  | 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: 3f361d4381f8eb1e0b0995b5831e179df70806e840b9390ac641f3cbe239f044

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e84c5b4f1aed4f240ac80197c9f88d455fac97d81f5648676068443096340b88",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2011-04-28T22:29:18Z",
    "title_canon_sha256": "6784907740320b7af8435a96419b9588a7460680d467346f66d3c0a580910a30"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.5523",
    "kind": "arxiv",
    "version": 1
  }
}