Pith Number

pith:WL7XXC22

pith:2003:WL7XXC22FX7A3L5OYQFRTRGHFG

not attested not anchored not stored refs pending

XMM-Newton discovery of O VII emission from warm gas in clusters of galaxies

F.B.S. Paerels, J.S. Kaastra, J.W.A. den Herder, R. Lieu, T. Tamura

arxiv:astro-ph/0305424 v1 · 2003-05-22 · astro-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{WL7XXC22FX7A3L5OYQFRTRGHFG}

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	2026-05-18T01:21:56.866853Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b2ff7b8b5a2dfe0dafaec40b19c4c72986d73f4441568291c3b925feedddda0d

Aliases

arxiv: astro-ph/0305424 · arxiv_version: astro-ph/0305424v1 · doi: 10.48550/arxiv.astro-ph/0305424 · pith_short_12: WL7XXC22FX7A · pith_short_16: WL7XXC22FX7A3L5O · pith_short_8: WL7XXC22

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/WL7XXC22FX7A3L5OYQFRTRGHFG \
  | 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: b2ff7b8b5a2dfe0dafaec40b19c4c72986d73f4441568291c3b925feedddda0d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ea1763e051b5fcb9a9ab2244abb6a8d70830a6ed0c6447dcdd354f7c1b9673a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-05-22T15:53:54Z",
    "title_canon_sha256": "0ab63682b112d9f014406809695d3f370ff0c09e492c3ad982fef89146f2fe0b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0305424",
    "kind": "arxiv",
    "version": 1
  }
}