Pith Number

pith:OPET3UE3

pith:2013:OPET3UE3CFIAXCZZGFJJLD72ZU

not attested not anchored not stored refs pending

A Joint Model Of X-ray And Infrared Backgrounds. II. Compton-Thick AGN Abundance

George Helou (Caltech), Lee Armus (Caltech), NJU), Yong Shi (Caltech

arxiv:1309.1202 v1 · 2013-09-04 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OPET3UE3CFIAXCZZGFJJLD72ZU}

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	2026-05-18T01:47:49.660963Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73c93dd09b11500b8b393152958ffacd0bc369c17ab614deec64b776e22123d2

Aliases

arxiv: 1309.1202 · arxiv_version: 1309.1202v1 · doi: 10.48550/arxiv.1309.1202 · pith_short_12: OPET3UE3CFIA · pith_short_16: OPET3UE3CFIAXCZZ · pith_short_8: OPET3UE3

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/OPET3UE3CFIAXCZZGFJJLD72ZU \
  | 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: 73c93dd09b11500b8b393152958ffacd0bc369c17ab614deec64b776e22123d2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "500f551be5c0fbfb0194f81ddbae4cce71b04367e68cc681e30490711e3b9976",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-09-04T22:39:14Z",
    "title_canon_sha256": "4f4a50760f72dbc7adc221ea98d50bb9bb5842ef8f66edb766afcf1f79891deb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.1202",
    "kind": "arxiv",
    "version": 1
  }
}