Pith Number

pith:W3SUAV5E

pith:2012:W3SUAV5E4BWKNQ2VQLWP2JMKBZ

not attested not anchored not stored refs pending

On the determination of the spin of the black hole in Cyg X-1 from X-ray reflection spectra

A.C. Fabian, C.S. Reynolds, D.R. Wilkins, E.M. Cackett, G.G. Pooley, J.M. Miller, J.S. Sanders, J. Wilms, K. Pottschmidt, M.A. Nowak, R.C. Reis, R.R. Ross

arxiv:1204.5854 v1 · 2012-04-26 · astro-ph.HE · astro-ph.SR

Open paper page JSON What is a Pith Number?

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

Receipt and verification

First computed	2026-05-18T01:57:43.993558Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b6e54057a4e06ca6c35582ecfd258a0e45c27be139caf42af838ac5d6fc40cf3

Aliases

arxiv: 1204.5854 · arxiv_version: 1204.5854v1 · doi: 10.48550/arxiv.1204.5854

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/W3SUAV5E4BWKNQ2VQLWP2JMKBZ \
  | 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: b6e54057a4e06ca6c35582ecfd258a0e45c27be139caf42af838ac5d6fc40cf3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "716bd347344a2478959b8b8572f58dac8bf26432679c8081df4ad9e35f3e45a3",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-04-26T07:55:11Z",
    "title_canon_sha256": "a890129f76e085e210209cfdf2885287c5429fd254279ac76015ccd267e9d3e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.5854",
    "kind": "arxiv",
    "version": 1
  }
}