Pith Number

pith:WJDJIMLL

pith:2017:WJDJIMLL4CEGJJKHUKVLPSL3ZX

not attested not anchored not stored refs pending

Black hole spin of Cyg X-1 determined from the softest state ever observed

Chris Done, Hiromitsu Takahashi, Magnus Axelsson, Shin'ya Yamada, Takafumi Kawano, Yasushi Fukazawa

arxiv:1701.05758 v1 · 2017-01-20 · 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{WJDJIMLL4CEGJJKHUKVLPSL3ZX}

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	2026-05-18T00:47:48.345819Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b24694316be08864a547a2aab7c97bcdf7fcb4e7827540f17bf8324ffb543f8a

Aliases

arxiv: 1701.05758 · arxiv_version: 1701.05758v1 · doi: 10.48550/arxiv.1701.05758 · pith_short_12: WJDJIMLL4CEG · pith_short_16: WJDJIMLL4CEGJJKH · pith_short_8: WJDJIMLL

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/WJDJIMLL4CEGJJKHUKVLPSL3ZX \
  | 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: b24694316be08864a547a2aab7c97bcdf7fcb4e7827540f17bf8324ffb543f8a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "83ffca821946184912b6a0514f7fd098e4f3ceee46f5591f1a69d69bd435a4a1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2017-01-20T11:11:23Z",
    "title_canon_sha256": "42c0f17187ca2dba487c7843cf34abb99337f4a7ed1b9cd6869aa760b72a0c88"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.05758",
    "kind": "arxiv",
    "version": 1
  }
}