Pith Number

pith:WRPYDJDV

pith:2019:WRPYDJDVRWA6KJFOKSWY5UOKAE

not attested not anchored not stored refs pending

Warm absorbers: supermassive black hole feeding, and Compton-thick AGN

Andrew King, Kastytis Zubovas

arxiv:1901.02224 v1 · 2019-01-08 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WRPYDJDVRWA6KJFOKSWY5UOKAE}

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	2026-05-17T23:55:53.009833Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b45f81a4758d81e524ae54ad8ed1ca013dfc3ed8cd68a69c762f272feca6ea32

Aliases

arxiv: 1901.02224 · arxiv_version: 1901.02224v1 · doi: 10.48550/arxiv.1901.02224 · pith_short_12: WRPYDJDVRWA6 · pith_short_16: WRPYDJDVRWA6KJFO · pith_short_8: WRPYDJDV

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/WRPYDJDVRWA6KJFOKSWY5UOKAE \
  | 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: b45f81a4758d81e524ae54ad8ed1ca013dfc3ed8cd68a69c762f272feca6ea32

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f2ff1dd52ff8469175880fd66e1a69a28a87a5b059390f7dbc7fb6b0068659c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-01-08T09:55:53Z",
    "title_canon_sha256": "5cf18fb9c6e64d21a9e5d931b9efaa50c80e08ef8f6349440d5a18e1431408cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.02224",
    "kind": "arxiv",
    "version": 1
  }
}