Pith Number

pith:QREG4CKM

pith:2001:QREG4CKMWQLFA5P54TGFKNUS2S

not attested not anchored not stored refs pending

The Anisotropy of the Ultra-High Energy Cosmic Rays

Francesc Ferrer (Barcelona), Subir Sarkar (Oxford), Wyn Evans (Oxford)

arxiv:astro-ph/0103085 v2 · 2001-03-06 · astro-ph · 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{QREG4CKMWQLFA5P54TGFKNUS2S}

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	2026-05-18T04:28:38.271339Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84486e094cb4165075fde4cc553692d48bf6b4f140176f0ee4fbc5bcab073926

Aliases

arxiv: astro-ph/0103085 · arxiv_version: astro-ph/0103085v2 · doi: 10.48550/arxiv.astro-ph/0103085 · pith_short_12: QREG4CKMWQLF · pith_short_16: QREG4CKMWQLFA5P5 · pith_short_8: QREG4CKM

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/QREG4CKMWQLFA5P54TGFKNUS2S \
  | 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: 84486e094cb4165075fde4cc553692d48bf6b4f140176f0ee4fbc5bcab073926

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4e420cb723dd29e593c46323665920edb24f77a4236565ec4cdd576c678b7ac",
    "cross_cats_sorted": [
      "hep-ph"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-03-06T00:09:36Z",
    "title_canon_sha256": "e4788afabcaf45e213a7cbfcafb7df048b99082dfdb2370e87a66b9df565ade0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0103085",
    "kind": "arxiv",
    "version": 2
  }
}