Pith Number

pith:4TZBTPAY

pith:2025:4TZBTPAY3JGN4X7RCOU5WN342W

not attested not anchored not stored refs pending

Comprehensive UV and Optical spectral analysis of Cygnus X-1: Stellar and wind parameters, abundances, and evolutionary implications

A.A.C. Sander, B. Kub\'atov\'a, D. Pauli, E. C. Schoesser, L. Mahy, L. M. Oskinova, M. Bernini-Peron, M. Brigitte, V. Ramachandran, W.-R. Hamann

arxiv:2504.05885 v2 · 2025-04-08 · astro-ph.SR · 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{4TZBTPAY3JGN4X7RCOU5WN342W}

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	2026-07-05T11:10:37.094503Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e4f219bc18da4cde5ff113a9db377cd598c70f8b06df10965b16240c9db024b3

Aliases

arxiv: 2504.05885 · arxiv_version: 2504.05885v2 · doi: 10.48550/arxiv.2504.05885 · pith_short_12: 4TZBTPAY3JGN · pith_short_16: 4TZBTPAY3JGN4X7R · pith_short_8: 4TZBTPAY

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/4TZBTPAY3JGN4X7RCOU5WN342W \
  | 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: e4f219bc18da4cde5ff113a9db377cd598c70f8b06df10965b16240c9db024b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae3760666e3a82210602360b1efb9b1ac85969b29c625220420dd9fc4c3e5bb8",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2025-04-08T10:18:57Z",
    "title_canon_sha256": "d52c00223fb897d21a1b05fdba2b429fc13e323b624a95019bb14f0ecc44344e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.05885",
    "kind": "arxiv",
    "version": 2
  }
}