Pith Number

pith:2XWQQ5OA

pith:2004:2XWQQ5OAANOMKK37RJY76M7WO7

not attested not anchored not stored refs pending

Measuring mass and angular momentum of black holes with high-frequency quasi-periodic oscillations

B. Aschenbach (MPE, Garching, Germany)

arxiv:astro-ph/0406545 v1 · 2004-06-24 · 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{2XWQQ5OAANOMKK37RJY76M7WO7}

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	2026-07-04T16:44:04.740390Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5ed0875c0035cc52b7f8a71ff33f677e54be27abd6f584e43f9d7ae9c733502

Aliases

arxiv: astro-ph/0406545 · arxiv_version: astro-ph/0406545v1 · doi: 10.48550/arxiv.astro-ph/0406545 · pith_short_12: 2XWQQ5OAANOM · pith_short_16: 2XWQQ5OAANOMKK37 · pith_short_8: 2XWQQ5OA

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/2XWQQ5OAANOMKK37RJY76M7WO7 \
  | 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: d5ed0875c0035cc52b7f8a71ff33f677e54be27abd6f584e43f9d7ae9c733502

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e4af2db63fb733326ca38ff7a592705f869b01d2e22f70fb1ee417178c075c7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-06-24T15:30:50Z",
    "title_canon_sha256": "6900fb97935b8af9e9f081af3315226e4e2f557b756816f3541d85fdb58602af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0406545",
    "kind": "arxiv",
    "version": 1
  }
}