Pith Number

pith:I2IBOUJP

pith:2006:I2IBOUJPKTSFDOGUBNORCY6723

not attested not anchored not stored refs pending

Gas mass fraction from XMM-Newton and Chandra high redshift clusters and its use as a cosmological test

Alain Blanchard (LATT), Luis Ferramacho (LATT)

arxiv:astro-ph/0609822 v2 · 2006-09-29 · 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{I2IBOUJPKTSFDOGUBNORCY6723}

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	2026-05-18T01:40:29.503949Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

469017512f54e451b8d40b5d1163dfd6e54822440db3f876bcca5edbbd0fa1b4

Aliases

arxiv: astro-ph/0609822 · arxiv_version: astro-ph/0609822v2 · doi: 10.48550/arxiv.astro-ph/0609822 · pith_short_12: I2IBOUJPKTSF · pith_short_16: I2IBOUJPKTSFDOGU · pith_short_8: I2IBOUJP

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/I2IBOUJPKTSFDOGUBNORCY6723 \
  | 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: 469017512f54e451b8d40b5d1163dfd6e54822440db3f876bcca5edbbd0fa1b4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "768f1669f787de4365c24d137221130f56a4d9429973f88bf6d7470fc8caef1a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-09-29T15:29:36Z",
    "title_canon_sha256": "226425a442626d536ab885ddeb2be364bc1beec27743cb67ebc866a317f67421"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0609822",
    "kind": "arxiv",
    "version": 2
  }
}