Pith Number

pith:2X2NGTX3

pith:2018:2X2NGTX3POLOC5RIA3IHHYRPHX

not attested not anchored not stored refs pending

Compton-thick AGN in the NuSTAR era III: A systematic study of the torus covering factor

Alberto Segreto, Andrea Comastri, Cristian Vignali, Giancarlo Cusumano, Giorgio Lanzuisi, Lea Marcotulli, Marco Ajello, Mislav Balokovic, Murray Brightman, Stefano Marchesi, Valentina La Parola, Xiurui Zhao

arxiv:1812.09217 v1 · 2018-12-21 · astro-ph.GA · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state 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

✓ 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	2026-05-17T23:54:08.099858Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5f4d34efb7b96e1762806d073e22f3de1940bac6d5885e8a47215051fd8bd45

Aliases

arxiv: 1812.09217 · arxiv_version: 1812.09217v1 · doi: 10.48550/arxiv.1812.09217 · pith_short_12: 2X2NGTX3POLO · pith_short_16: 2X2NGTX3POLOC5RI · pith_short_8: 2X2NGTX3

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/2X2NGTX3POLOC5RIA3IHHYRPHX \
  | 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: d5f4d34efb7b96e1762806d073e22f3de1940bac6d5885e8a47215051fd8bd45

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48d3a7399201283c78851786001fdb0ecf36db47039df86e7544fc38a2f6879b",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-12-21T16:00:41Z",
    "title_canon_sha256": "84105a65936942f372135f3174607eda5ccf60957a9447a743f26d47cdcd0aef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.09217",
    "kind": "arxiv",
    "version": 1
  }
}