Pith Number

pith:CRT7L3P6

pith:2017:CRT7L3P6KJ45LRA6B4MBLMYNOV

not attested not anchored not stored refs pending

A Comparison of Two Methods for Estimating Black Hole Spin in Active Galactic Nuclei

Daniel M. Capellupo, Daryl Haggard, Gaylor Wafflard-Fernandez

arxiv:1701.07887 v1 · 2017-01-26 · astro-ph.GA · 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{CRT7L3P6KJ45LRA6B4MBLMYNOV}

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	2026-05-18T00:50:43.695196Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1467f5edfe5279d5c41e0f1815b30d75770d8dff65e13d4bbb33343c9f428b91

Aliases

arxiv: 1701.07887 · arxiv_version: 1701.07887v1 · doi: 10.48550/arxiv.1701.07887 · pith_short_12: CRT7L3P6KJ45 · pith_short_16: CRT7L3P6KJ45LRA6 · pith_short_8: CRT7L3P6

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/CRT7L3P6KJ45LRA6B4MBLMYNOV \
  | 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: 1467f5edfe5279d5c41e0f1815b30d75770d8dff65e13d4bbb33343c9f428b91

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2ee836b52f522419b7fad6ded2d719d6367e378c6c450c7e44dd83c15840688",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-01-26T21:52:20Z",
    "title_canon_sha256": "69ab6055722f04ad64c58e0aeba5457694d77194cda5e6ba7c6e77e1ca20bea6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.07887",
    "kind": "arxiv",
    "version": 1
  }
}