Pith Number

pith:KIIFDRWQ

pith:2007:KIIFDRWQYQZLH6HDX4NYFBUDZH

not attested not anchored not stored refs pending

Long-term developments in Her X-1: Correlation between the histories of the 35 day turn-on cycle and the 1.24 sec pulse period

D. Klochkov, J Wilms, K. Postnov, N. Shakura, R. Staubert, S. Schandl

arxiv:astro-ph/0702528 v1 · 2007-02-20 · 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{KIIFDRWQYQZLH6HDX4NYFBUDZH}

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	2026-07-04T17:22:17.057658Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

521051c6d0c432b3f8e3bf1b828683c9df4ecfcc61d2f2e170e3051ce5302072

Aliases

arxiv: astro-ph/0702528 · arxiv_version: astro-ph/0702528v1 · doi: 10.48550/arxiv.astro-ph/0702528 · pith_short_12: KIIFDRWQYQZL · pith_short_16: KIIFDRWQYQZLH6HD · pith_short_8: KIIFDRWQ

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/KIIFDRWQYQZLH6HDX4NYFBUDZH \
  | 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: 521051c6d0c432b3f8e3bf1b828683c9df4ecfcc61d2f2e170e3051ce5302072

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b7e675571267771812a8d5ec19816773d3003f0a854a6095942b21c464867ef",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-02-20T14:38:46Z",
    "title_canon_sha256": "17e467b3e17590609f6072905c962ea66f274602ea224f180f68880fc1cfa016"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0702528",
    "kind": "arxiv",
    "version": 1
  }
}