Pith Number

pith:K4RT3XDA

pith:2018:K4RT3XDAUHWSWKJIOOPTEAEIUM

not attested not anchored not stored refs pending

The link between X-ray complexity and optical lines in NLS1s

A. Cattapan, A. Vietri, E. Congiu, G. La Mura, M. Berton, M. Frezzato, P. Rafanelli, S. Chen, S. Ciroi, T. Peruzzi, V. Cracco

arxiv:1809.09901 v1 · 2018-09-26 · astro-ph.GA

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	2026-05-18T00:04:43.338086Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

57233ddc60a1ed2b2928739f320088a33371e9649f986cd2059550ee4858a2f3

Aliases

arxiv: 1809.09901 · arxiv_version: 1809.09901v1 · doi: 10.48550/arxiv.1809.09901 · pith_short_12: K4RT3XDAUHWS · pith_short_16: K4RT3XDAUHWSWKJI · pith_short_8: K4RT3XDA

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/K4RT3XDAUHWSWKJIOOPTEAEIUM \
  | 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: 57233ddc60a1ed2b2928739f320088a33371e9649f986cd2059550ee4858a2f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6dd4a1bf3b451c7ddc9346ee6d970804ab7fe6c95d9dba5dfb39a5503b9ab3d3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-09-26T10:57:31Z",
    "title_canon_sha256": "6d026e9de74169a6cc653ea413f72ca129047df139408dd96095065b726fce53"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.09901",
    "kind": "arxiv",
    "version": 1
  }
}