Pith Number

pith:O6JQR4OJ

pith:1995:O6JQR4OJPJ3UKGMDYBY7QDLRTT

not attested not anchored not stored refs pending

A FIRST DETERMINATION OF THE SURFACE DENSITY OF GALAXY CLUSTERS AT VERY LOW X--RAY FLUXES

C. Norman, P. Rosati, R. Burg, R. Della Ceca, R. Giacconi

arxiv:astro-ph/9503064 v1 · 1995-03-16 · 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{O6JQR4OJPJ3UKGMDYBY7QDLRTT}

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	2026-05-18T01:07:41.714532Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

779308f1c97a77451983c071f80d719cf6b775cdb20c70f390bbff3f64106d43

Aliases

arxiv: astro-ph/9503064 · arxiv_version: astro-ph/9503064v1 · doi: 10.48550/arxiv.astro-ph/9503064 · pith_short_12: O6JQR4OJPJ3U · pith_short_16: O6JQR4OJPJ3UKGMD · pith_short_8: O6JQR4OJ

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/O6JQR4OJPJ3UKGMDYBY7QDLRTT \
  | 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: 779308f1c97a77451983c071f80d719cf6b775cdb20c70f390bbff3f64106d43

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f59521e39c3670db947c0e0d0621116775b83059d2d75fbcd6da0f1ea5216f00",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-03-16T03:24:55Z",
    "title_canon_sha256": "4450fc1c4984535f1a63301d851350cc2de0ceffce82c9ebd99fa076b6a6a122"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9503064",
    "kind": "arxiv",
    "version": 1
  }
}