Pith Number

pith:4V7YBUCO

pith:2003:4V7YBUCOU4FUOVHU6EB4UCLO5Q

not attested not anchored not stored refs pending

X-rays from Clusters of Galaxies

A.C. Fabian, Cambridge, S.W. Allen (Institute of Astronomy, UK)

arxiv:astro-ph/0304020 v1 · 2003-04-01 · astro-ph

Open paper page JSON What is a Pith Number?

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

Receipt and verification

First computed	2026-05-18T00:37:00.761745Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e57f80d04ea70b4754f4f103ca096eec3781c49559f2c1c4894cc3221a7fd173

Aliases

arxiv: astro-ph/0304020 · arxiv_version: astro-ph/0304020v1 · doi: 10.48550/arxiv.astro-ph/0304020

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/4V7YBUCOU4FUOVHU6EB4UCLO5Q \
  | 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: e57f80d04ea70b4754f4f103ca096eec3781c49559f2c1c4894cc3221a7fd173

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e9145f5f11787e678c311553a559ffdc0a669eca8dfcc7224510674761dafd43",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-04-01T11:23:31Z",
    "title_canon_sha256": "358bb3e7b0209239423b9c8020aeed4f80f91c43735778aea4f4d2a507024358"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0304020",
    "kind": "arxiv",
    "version": 1
  }
}