Pith Number

pith:WRH4O247

pith:2007:WRH4O247FVJHWC3QIEKKO4A6NN

not attested not anchored not stored refs pending

Ultraviolet observations of the X-ray photoionized wind of Cygnus X-1 during X-ray soft/high state

A. Hunacek, B. Boroson, C.T. Bolton, D Gies, S.D. Vrtilek

arxiv:0710.3499 v1 · 2007-10-18 · 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{WRH4O247FVJHWC3QIEKKO4A6NN}

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	2026-07-04T17:06:18.933787Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b44fc76b9f2d527b0b704114a7701e6b52daa7f25b1b2adede573102b71f3acd

Aliases

arxiv: 0710.3499 · arxiv_version: 0710.3499v1 · doi: 10.48550/arxiv.0710.3499 · pith_short_12: WRH4O247FVJH · pith_short_16: WRH4O247FVJHWC3Q · pith_short_8: WRH4O247

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/WRH4O247FVJHWC3QIEKKO4A6NN \
  | 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: b44fc76b9f2d527b0b704114a7701e6b52daa7f25b1b2adede573102b71f3acd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c8e49917e6455079d62058db12e6de748aa8d975b25db5cf96a6091f3b1561e8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-10-18T13:22:04Z",
    "title_canon_sha256": "2dfc2caf6cd81a9e338dbd57fa973aabe3ff99ff00eb89fe29959513d996a9c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0710.3499",
    "kind": "arxiv",
    "version": 1
  }
}