Pith Number

pith:HFZFLYW5

pith:2021:HFZFLYW5Z22C2PS2MPEOU4FBBJ

not attested not anchored not stored refs pending

The cluster-central compact steep-spectrum radio galaxy 1321+045

Aneta Siemiginowska, D. J. Burke, Ewan O'Sullivan, Fran\c{c}oise Combes, Magdalena Kunert-Bajraszewska, Philippe Salom\'e, Simona Giacintucci

arxiv:2104.04548 v2 · 2021-04-09 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HFZFLYW5Z22C2PS2MPEOU4FBBJ}

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	2026-07-05T02:47:35.204243Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

397255e2ddceb42d3e5a63c8ea70a10a674eaa6a6ee14181a33702b51070ce75

Aliases

arxiv: 2104.04548 · arxiv_version: 2104.04548v2 · doi: 10.48550/arxiv.2104.04548 · pith_short_12: HFZFLYW5Z22C · pith_short_16: HFZFLYW5Z22C2PS2 · pith_short_8: HFZFLYW5

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/HFZFLYW5Z22C2PS2MPEOU4FBBJ \
  | 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: 397255e2ddceb42d3e5a63c8ea70a10a674eaa6a6ee14181a33702b51070ce75

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f72ec3ed2fcb2b88fdc69988f7fac2ebe8981b3fd2883acc632076fdc76dc5f",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2021-04-09T18:18:48Z",
    "title_canon_sha256": "5ed7ac4c970bd089a0b5a40b41a8696b94c03c8362fe84ebf7dd1585dca85ba8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.04548",
    "kind": "arxiv",
    "version": 2
  }
}