Pith Number

pith:ZDFE32II

pith:2010:ZDFE32IIWKMQXUJTBSFDZ5WT3P

not attested not anchored not stored refs pending

Which radio galaxies can make the highest-energy cosmic rays?

M. J. Hardcastle

arxiv:1003.2500 v2 · 2010-03-12 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZDFE32IIWKMQXUJTBSFDZ5WT3P}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:08:34.637727Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c8ca4de908b2990bd1330c8a3cf6d3dbcdae3baed9f822fe56b7e193b2a91dbe

Aliases

arxiv: 1003.2500 · arxiv_version: 1003.2500v2 · doi: 10.48550/arxiv.1003.2500 · pith_short_12: ZDFE32IIWKMQ · pith_short_16: ZDFE32IIWKMQXUJT · pith_short_8: ZDFE32II

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/ZDFE32IIWKMQXUJTBSFDZ5WT3P \
  | 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: c8ca4de908b2990bd1330c8a3cf6d3dbcdae3baed9f822fe56b7e193b2a91dbe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a546c3d137e7cfe07dab367edec74c3cc0d4fb2f464a53a199ca8f04bdc4018d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2010-03-12T09:20:23Z",
    "title_canon_sha256": "4ff19d6ba8afae69e765af5d3a8c730575fcfbc5293ace55ab81bd4a02f38ce6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1003.2500",
    "kind": "arxiv",
    "version": 2
  }
}