Pith Number

pith:JQTJEBCC

pith:2009:JQTJEBCC4D4WDG4O6VLXPMG5L7

not attested not anchored not stored refs pending

Active Galactic Nuclei with Starbursts: Sources for Ultra High Energy Cosmic Rays

A. Meli, I.C. Maris, J.K. Becker, L.A. Gergely, L. Caramete, P.L. Biermann, T. Stanev, V. de Souza

arxiv:0904.1507 v2 · 2009-04-09 · astro-ph.HE · gr-qc · hep-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{JQTJEBCC4D4WDG4O6VLXPMG5L7}

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	2026-05-18T04:37:34.262064Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c26920442e0f9619b8ef55777b0dd5fe593a39c39d76139a5d83f33ecba02de

Aliases

arxiv: 0904.1507 · arxiv_version: 0904.1507v2 · doi: 10.48550/arxiv.0904.1507 · pith_short_12: JQTJEBCC4D4W · pith_short_16: JQTJEBCC4D4WDG4O · pith_short_8: JQTJEBCC

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/JQTJEBCC4D4WDG4O6VLXPMG5L7 \
  | 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: 4c26920442e0f9619b8ef55777b0dd5fe593a39c39d76139a5d83f33ecba02de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e6532dc45cc009f7efbd636f0a4a6d7146b0443ea1216132fceedd6b9905b00b",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-04-09T11:53:32Z",
    "title_canon_sha256": "86cb85a6aeb7b992693907b4b27a9f3471cada446b2ce087aae747409b26cdcf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.1507",
    "kind": "arxiv",
    "version": 2
  }
}