Pith Number

pith:HVVEBW7N

pith:2004:HVVEBW7N2ECXFW5FWLEIJ6YLOP

not attested not anchored not stored refs pending

Compton Thick AGN: the dark side of the X-ray background

Andrea Comastri (INAF-Osservatorio Astronomico di Bologna)

arxiv:astro-ph/0403693 v1 · 2004-03-30 · 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{HVVEBW7N2ECXFW5FWLEIJ6YLOP}

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	2026-05-18T01:21:50.241221Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3d6a40dbedd10572dba5b2c884fb0b73f51c4cb06f56aa85330f75b5f0aa648a

Aliases

arxiv: astro-ph/0403693 · arxiv_version: astro-ph/0403693v1 · doi: 10.48550/arxiv.astro-ph/0403693 · pith_short_12: HVVEBW7N2ECX · pith_short_16: HVVEBW7N2ECXFW5F · pith_short_8: HVVEBW7N

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/HVVEBW7N2ECXFW5FWLEIJ6YLOP \
  | 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: 3d6a40dbedd10572dba5b2c884fb0b73f51c4cb06f56aa85330f75b5f0aa648a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a928aaf5408106cb32bcf4cc6604407e00a477bafe9be5348dea2102eef587ae",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-03-30T21:01:22Z",
    "title_canon_sha256": "f6094eeae458de796266d6b0ff2241942d3f9cf28133ccd40693feca2ed30957"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0403693",
    "kind": "arxiv",
    "version": 1
  }
}