Pith Number

pith:3XFHSOP2

pith:1994:3XFHSOP24YTAVHDUN5K4LPEJGI

not attested not anchored not stored refs pending

The contribution of AGNs to the X-ray background

A. Comastri, G. Hasinger, G. Setti, G. Zamorani

arxiv:astro-ph/9409067 v1 · 1994-09-27 · 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{3XFHSOP24YTAVHDUN5K4LPEJGI}

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	2026-05-18T04:21:41.188752Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ddca7939fae6260a9c746f55c5bc893216477c74507443482313fadaec7a3210

Aliases

arxiv: astro-ph/9409067 · arxiv_version: astro-ph/9409067v1 · doi: 10.48550/arxiv.astro-ph/9409067 · pith_short_12: 3XFHSOP24YTA · pith_short_16: 3XFHSOP24YTAVHDU · pith_short_8: 3XFHSOP2

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/3XFHSOP24YTAVHDUN5K4LPEJGI \
  | 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: ddca7939fae6260a9c746f55c5bc893216477c74507443482313fadaec7a3210

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "701b1a69e6a2271f0adb0a8d7c85a1513ce686df6e6f2a2bb351301581372f6c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1994-09-27T11:13:18Z",
    "title_canon_sha256": "0eda2a7467505a7d8c6e5adb557c60a0de38f04668c8da7417952d0163cd14e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9409067",
    "kind": "arxiv",
    "version": 1
  }
}