Pith Number

pith:7UAEKSI7

pith:2009:7UAEKSI7MCUURNXMSKVTVOSWRD

not attested not anchored not stored refs pending

Gas entropy in a representative sample of nearby X-ray galaxy clusters (REXCESS): relationship to gas mass fraction

G.M. Voit, G.W. Pratt (CEA Saclay, H. Boehringer, J.H. Croston, M. Arnaud, MPE), R.G. Bower, R. Piffaretti, S. Borgani, T.J. Ponman

arxiv:0909.3776 v2 · 2009-09-21 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7UAEKSI7MCUURNXMSKVTVOSWRD}

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	2026-05-18T02:42:29.372183Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd0045491f60a948b6ec92ab3aba5688eb956a1e7d566aba69f4d85a524d76bf

Aliases

arxiv: 0909.3776 · arxiv_version: 0909.3776v2 · doi: 10.48550/arxiv.0909.3776 · pith_short_12: 7UAEKSI7MCUU · pith_short_16: 7UAEKSI7MCUURNXM · pith_short_8: 7UAEKSI7

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/7UAEKSI7MCUURNXMSKVTVOSWRD \
  | 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: fd0045491f60a948b6ec92ab3aba5688eb956a1e7d566aba69f4d85a524d76bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "39aa7a91665cd3264681e462d181365da17c56ce25fcbacf82b059b3a9660443",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-21T14:02:54Z",
    "title_canon_sha256": "0e0559010d0fd3efc14608b8411ed70514375882791f4984290b7334675b4754"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.3776",
    "kind": "arxiv",
    "version": 2
  }
}