Pith Number

pith:7K7H7DXQ

pith:2001:7K7H7DXQBKTMFXIPTTPSXEGMKH

not attested not anchored not stored refs pending

The X-ray Spectrum of Cyg X-2

C. Done, D. A. Smith, P. T. Zycki

arxiv:astro-ph/0111497 v1 · 2001-11-27 · 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{7K7H7DXQBKTMFXIPTTPSXEGMKH}

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	2026-07-04T16:24:31.904375Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fabe7f8ef00aa6c2dd0f9cdf2b90cc51c497dd6b89fb2708eb5da83ef53af878

Aliases

arxiv: astro-ph/0111497 · arxiv_version: astro-ph/0111497v1 · doi: 10.48550/arxiv.astro-ph/0111497 · pith_short_12: 7K7H7DXQBKTM · pith_short_16: 7K7H7DXQBKTMFXIP · pith_short_8: 7K7H7DXQ

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/7K7H7DXQBKTMFXIPTTPSXEGMKH \
  | 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: fabe7f8ef00aa6c2dd0f9cdf2b90cc51c497dd6b89fb2708eb5da83ef53af878

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c7ebaf35e3a04938411c7aa62eec328d7c31fb3caecf21047dc6af2f5ad48bb2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-11-27T10:17:11Z",
    "title_canon_sha256": "39ec702544667a6b3d73fcba3fc2582c4aac63826d052536b27df0f9facbec21"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0111497",
    "kind": "arxiv",
    "version": 1
  }
}