Pith Number

pith:PYYO44TF

pith:2019:PYYO44TF26KSB46N4UJIGDXFOZ

not attested not anchored not stored refs pending

Long-term spectral study of the black hole Cygnus X-1 using INTEGRAL

F. Cangemi, I. Kreykenbohm, J. Rodriguez, J. Wilms, K. Pottschmidt, P. Laurent, T. Beuchert, T. Siegert, V. Grinberg

arxiv:1904.09112 v1 · 2019-04-19 · 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{PYYO44TF26KSB46N4UJIGDXFOZ}

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	2026-05-17T23:48:08.308984Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e30ee7265d79520f3cde512830ee57678c1fcf5d49cf898bb47bfac810c90a2

Aliases

arxiv: 1904.09112 · arxiv_version: 1904.09112v1 · doi: 10.48550/arxiv.1904.09112 · pith_short_12: PYYO44TF26KS · pith_short_16: PYYO44TF26KSB46N · pith_short_8: PYYO44TF

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/PYYO44TF26KSB46N4UJIGDXFOZ \
  | 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: 7e30ee7265d79520f3cde512830ee57678c1fcf5d49cf898bb47bfac810c90a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6fcd9b3a7a5b711a061fd0f697359a64123eeef86b53359f0330196eeb7458a5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-04-19T08:04:39Z",
    "title_canon_sha256": "7ddefbb397184689e06ebe3367387ff01a977c3f12f1752821fdbadfd6fb3b43"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.09112",
    "kind": "arxiv",
    "version": 1
  }
}