Pith Number

pith:O56QXCPA

pith:2008:O56QXCPABTUIW2XYRJVLFYPHQR

not attested not anchored not stored refs pending

Active Galactic Nuclei: Sources for ultra high energy cosmic rays?

A. Curutiu, A. Meli, C. Zier, H. Falcke, I. C. Maris, J. K. Becker, K.-H. Kampert, L. A. Gergely, L. Caramete, O. Tascau, P. G. Isar, P. L. Biermann, R. Engel, T. Stanev

arxiv:0811.1848 v3 · 2008-11-12 · astro-ph · 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{O56QXCPABTUIW2XYRJVLFYPHQR}

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	2026-07-04T15:46:22.858861Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

777d0b89e00ce88b6af88a6ab2e1e7846ee5989006e3bc4125447c791518edfb

Aliases

arxiv: 0811.1848 · arxiv_version: 0811.1848v3 · doi: 10.48550/arxiv.0811.1848 · pith_short_12: O56QXCPABTUI · pith_short_16: O56QXCPABTUIW2XY · pith_short_8: O56QXCPA

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/O56QXCPABTUIW2XYRJVLFYPHQR \
  | 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: 777d0b89e00ce88b6af88a6ab2e1e7846ee5989006e3bc4125447c791518edfb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bac99262d7f03e858653b268d4692eae0d1f0a8ce9ed5851a049f0700af08e1f",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-11-12T09:42:25Z",
    "title_canon_sha256": "ced659fda5fa948cc0d9ba733a5439a7b50929bab51d78ff7fbef029c9724f24"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0811.1848",
    "kind": "arxiv",
    "version": 3
  }
}