Pith Number

pith:2LZ3AJ5M

pith:2009:2LZ3AJ5MOPH44LZEIDZBFNSU6J

not attested not anchored not stored refs pending

The X-ray luminous cluster underlying the bright radio-quiet quasar H1821+643

A. C. Fabian, C. S. Crawford, H. R. Russell, J. S. Sanders, K. M. Blundell, R. M. Johnstone, W. N. Brandt

arxiv:0911.2339 v1 · 2009-11-12 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2LZ3AJ5MOPH44LZEIDZBFNSU6J}

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	2026-05-18T04:42:02.673689Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d2f3b027ac73cfce2f2440f212b654f243fa144abb3935afb823de553c140d56

Aliases

arxiv: 0911.2339 · arxiv_version: 0911.2339v1 · doi: 10.48550/arxiv.0911.2339 · pith_short_12: 2LZ3AJ5MOPH4 · pith_short_16: 2LZ3AJ5MOPH44LZE · pith_short_8: 2LZ3AJ5M

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/2LZ3AJ5MOPH44LZEIDZBFNSU6J \
  | 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: d2f3b027ac73cfce2f2440f212b654f243fa144abb3935afb823de553c140d56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5170951b14e224211cd7b0af13f1dbaf858a8f24d06e26431ba41d1a8a9c444e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-11-12T10:09:22Z",
    "title_canon_sha256": "cc083de75689b234ef2e25eb5676a30f0a7f92b1a48a7dd8cc9cccca3340aedd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.2339",
    "kind": "arxiv",
    "version": 1
  }
}