Pith Number

pith:AJKCRSBR

pith:2009:AJKCRSBROL4BTR3EU3P33G6EI7

not attested not anchored not stored refs pending

On the distribution of frequency ratios of kHz QPOs

Didier Barret (CESR), Gabriel Torok (Silesian University in Opava), Martin Boutelier (CESR, Toulouse), Yongfeng Lin (CESR & Tsinghua University)

arxiv:0909.2990 v1 · 2009-09-16 · 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{AJKCRSBROL4BTR3EU3P33G6EI7}

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	2026-05-18T02:11:47.223416Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

025428c83172f819c764a6dfbd9bc447e8284da211df7cd44914f227950b666e

Aliases

arxiv: 0909.2990 · arxiv_version: 0909.2990v1 · doi: 10.48550/arxiv.0909.2990 · pith_short_12: AJKCRSBROL4B · pith_short_16: AJKCRSBROL4BTR3E · pith_short_8: AJKCRSBR

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/AJKCRSBROL4BTR3EU3P33G6EI7 \
  | 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: 025428c83172f819c764a6dfbd9bc447e8284da211df7cd44914f227950b666e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e4fa9ae924d6731c324ab657cbbbfb4d529395b2e38b7519f5726539b91eae06",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-09-16T12:03:12Z",
    "title_canon_sha256": "22de1df373188730e90ba24080646ad1eb8e87da244174d0d6fab797ef792147"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2990",
    "kind": "arxiv",
    "version": 1
  }
}