Pith Number

pith:4W2Z4M7Q

pith:1998:4W2Z4M7QHEMWG2FCLEG2VAXI4V

not attested not anchored not stored refs pending

A dusty X-ray absorber in the Perseus Cluster ?

Keith A. Arnaud, Richard F. Mushotzky

arxiv:astro-ph/9802046 v1 · 1998-02-03 · 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{4W2Z4M7QHEMWG2FCLEG2VAXI4V}

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	2026-07-04T16:06:08.420582Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5b59e33f039196368a2590daa82e8e543b3cfcea749feb69d07f2b018d422bb

Aliases

arxiv: astro-ph/9802046 · arxiv_version: astro-ph/9802046v1 · doi: 10.48550/arxiv.astro-ph/9802046 · pith_short_12: 4W2Z4M7QHEMW · pith_short_16: 4W2Z4M7QHEMWG2FC · pith_short_8: 4W2Z4M7Q

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/4W2Z4M7QHEMWG2FCLEG2VAXI4V \
  | 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: e5b59e33f039196368a2590daa82e8e543b3cfcea749feb69d07f2b018d422bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9aa313838d7f18f86531148a0a3a815490dc12b4cc38736c65e02524359c00a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-02-03T23:34:54Z",
    "title_canon_sha256": "e04c599db6c6fc1c4085822e0ebd340b647aa3808c002676fe48c1587f2ad0b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9802046",
    "kind": "arxiv",
    "version": 1
  }
}