Pith Number

pith:OPYA77KT

pith:2011:OPYA77KTXIKZ6VBEZ6U6ZXCI4Z

not attested not anchored not stored refs pending

A new model for the extragalactic gamma-ray background

Francesco Haardt, Massimo Cavadini, Ruben Salvaterra

arxiv:1105.4613 v1 · 2011-05-23 · 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{OPYA77KTXIKZ6VBEZ6U6ZXCI4Z}

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	2026-05-18T04:21:22.039670Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73f00ffd53ba159f5424cfa9ecdc48e64ef10075cac73f085605a481e301f4cd

Aliases

arxiv: 1105.4613 · arxiv_version: 1105.4613v1 · doi: 10.48550/arxiv.1105.4613 · pith_short_12: OPYA77KTXIKZ · pith_short_16: OPYA77KTXIKZ6VBE · pith_short_8: OPYA77KT

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/OPYA77KTXIKZ6VBEZ6U6ZXCI4Z \
  | 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: 73f00ffd53ba159f5424cfa9ecdc48e64ef10075cac73f085605a481e301f4cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "34c098d84656c5b916385d3f220284a7ce6fa9e8fd4f1830c9a836387858cbcb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-05-23T20:00:08Z",
    "title_canon_sha256": "228b2ee15d637e5e164717d3daf806d5b319d1655716cfeb08ba7c6ceb6bbf9c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.4613",
    "kind": "arxiv",
    "version": 1
  }
}