Pith Number

pith:5LPZU44I

pith:2006:5LPZU44I4TOXB63CDAIQ5FWWXD

not attested not anchored not stored refs pending

The cosmic X-ray background and the population of the most heavily obscured AGNs

2), (2) Uni Ferrara, (3) INAF/OA Bologna, (4) INAF/OA Roma, (5) Uni Bologna, 6), (6) INAF/IRA, (7) INAF/IASF Roma), Andrea Comastri (3), Eliana Palazzi (1) ((1) INAF/IASF Bologna, Enrico Costa (7), Fabrizio Fiore (4), Filippo Frontera (1, Giancarlo Setti (5, Lorenzo Amati (1), Mauro Orlandini (1), Nicola Masetti (1), Raffaella Landi (1)

arxiv:astro-ph/0611228 v2 · 2006-11-07 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5LPZU44I4TOXB63CDAIQ5FWWXD}

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	2026-05-18T04:33:03.449333Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eadf9a7388e4dd70fb6218110e96d6b8c712b8b9d0fb0c42cada72c1ece66dd8

Aliases

arxiv: astro-ph/0611228 · arxiv_version: astro-ph/0611228v2 · doi: 10.48550/arxiv.astro-ph/0611228 · pith_short_12: 5LPZU44I4TOX · pith_short_16: 5LPZU44I4TOXB63C · pith_short_8: 5LPZU44I

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/5LPZU44I4TOXB63CDAIQ5FWWXD \
  | 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: eadf9a7388e4dd70fb6218110e96d6b8c712b8b9d0fb0c42cada72c1ece66dd8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "062c7d2d3ddd8893259a8297db6e1e05be4bba9396bdb840b9fc0daca8d1d777",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-11-07T16:54:17Z",
    "title_canon_sha256": "4dd05f6784697f623c5a20e6750ef1dc16d18472f1ac26c75217c673ee2cf918"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0611228",
    "kind": "arxiv",
    "version": 2
  }
}