Pith Number

pith:YN6LL45Z

pith:1997:YN6LL45ZGWNDRSM4K6Y7CXO2U7

not attested not anchored not stored refs pending

The Nature of Spectral Transitions in Accreting Black Holes: The Case of Cyg X-1

Felix Ryde, Julian Krolik, Juri Poutanen

arxiv:astro-ph/9709007 v1 · 1997-09-01 · 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{YN6LL45ZGWNDRSM4K6Y7CXO2U7}

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	2026-05-18T01:22:58.639375Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c37cb5f3b9359a38c99c57b1f15ddaa7dd9ee1a754ff77d91bbaca7f5e7f2392

Aliases

arxiv: astro-ph/9709007 · arxiv_version: astro-ph/9709007v1 · doi: 10.48550/arxiv.astro-ph/9709007 · pith_short_12: YN6LL45ZGWND · pith_short_16: YN6LL45ZGWNDRSM4 · pith_short_8: YN6LL45Z

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/YN6LL45ZGWNDRSM4K6Y7CXO2U7 \
  | 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: c37cb5f3b9359a38c99c57b1f15ddaa7dd9ee1a754ff77d91bbaca7f5e7f2392

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b8410060c73d2677a8ca03ba7bfb9f23d14619ec287b6b1a1eba6ada11e21451",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-09-01T18:17:45Z",
    "title_canon_sha256": "c6a8082a34dadf73fafb5f62ae1a9f50a5eb18691d72476f6a349b77db7cd184"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9709007",
    "kind": "arxiv",
    "version": 1
  }
}