Pith Number

pith:WO4JZXXK

pith:2018:WO4JZXXKDDL33LAXT3DUAJKOC2

not attested not anchored not stored refs pending

An X-ray view of central engines of low luminosity quasars (LLQSO) in the local Universe

Alex G. Markowitz, Matteo Guainazzi, Ritesh Ghosh, Sibasish Laha (UCSD)

arxiv:1807.07641 v1 · 2018-07-19 · 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{WO4JZXXKDDL33LAXT3DUAJKOC2}

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	2026-05-18T00:09:23.853001Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b3b89cdeea18d7bdac179ec740254e16a81d3e80b68b73af756e9ef943f635fc

Aliases

arxiv: 1807.07641 · arxiv_version: 1807.07641v1 · doi: 10.48550/arxiv.1807.07641 · pith_short_12: WO4JZXXKDDL3 · pith_short_16: WO4JZXXKDDL33LAX · pith_short_8: WO4JZXXK

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/WO4JZXXKDDL33LAXT3DUAJKOC2 \
  | 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: b3b89cdeea18d7bdac179ec740254e16a81d3e80b68b73af756e9ef943f635fc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e73bdceeeeac698fe1ada1b99a59c9317e20d2527c155b30ad5fcebe67ba524f",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-07-19T21:06:12Z",
    "title_canon_sha256": "eba2225f96de8b93c9b78ead9bd343c44f5724ecc2f8f05882dcc882283eb1dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.07641",
    "kind": "arxiv",
    "version": 1
  }
}