Pith Number

pith:XN4BQBQJ

pith:2025:XN4BQBQJP6JU4ZUACD6PYI5Y2H

not attested not anchored not stored refs pending

The structure of the giant radio fossil in the Ophiuchus galaxy cluster

Daniel R. Wik, Maxim Markevitch, Simona Giacintucci, Tracy Clarke

arxiv:2508.20190 v1 · 2025-08-27 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XN4BQBQJP6JU4ZUACD6PYI5Y2H}

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	2026-07-05T12:00:31.035776Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb781806097f934e668010fcfc23b8d1e89a5ac89dbfa99dad6b589e36155423

Aliases

arxiv: 2508.20190 · arxiv_version: 2508.20190v1 · doi: 10.48550/arxiv.2508.20190 · pith_short_12: XN4BQBQJP6JU · pith_short_16: XN4BQBQJP6JU4ZUA · pith_short_8: XN4BQBQJ

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/XN4BQBQJP6JU4ZUACD6PYI5Y2H \
  | 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: bb781806097f934e668010fcfc23b8d1e89a5ac89dbfa99dad6b589e36155423

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b9f9a2c95647e5367109d2db9a0d21432f7ee3dd22d82da2e3f9b56accb1436",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2025-08-27T18:06:44Z",
    "title_canon_sha256": "5cf8fce7dae604d4c99cc2e0d08d13fccc08ea4d54981878ba8cda790d3c1f60"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.20190",
    "kind": "arxiv",
    "version": 1
  }
}