Pith Number

pith:7XG3XWMP

pith:2000:7XG3XWMPKQFD4TKJAUWZ75FAQF

not attested not anchored not stored refs pending

X-ray Properties of Groups of Galaxies

John S. Mulchaey

arxiv:astro-ph/0009379 v2 · 2000-09-22 · 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{7XG3XWMPKQFD4TKJAUWZ75FAQF}

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	2026-07-04T16:17:11.381874Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fdcdbbd98f540a3e4d49052d9ff4a08141954b89c851d9b3401202d0e5cd5d6b

Aliases

arxiv: astro-ph/0009379 · arxiv_version: astro-ph/0009379v2 · doi: 10.48550/arxiv.astro-ph/0009379 · pith_short_12: 7XG3XWMPKQFD · pith_short_16: 7XG3XWMPKQFD4TKJ · pith_short_8: 7XG3XWMP

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/7XG3XWMPKQFD4TKJAUWZ75FAQF \
  | 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: fdcdbbd98f540a3e4d49052d9ff4a08141954b89c851d9b3401202d0e5cd5d6b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e67b72e31449e36e5a56d7fc7cdcfc96827d065fdfb305ab44ab681e580bd04c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-09-22T23:44:29Z",
    "title_canon_sha256": "2d1a6f8f1a06179e4ffc2cb29b438cfdba200cf921d2b19bbe4c228ef34beed6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0009379",
    "kind": "arxiv",
    "version": 2
  }
}