Pith Number

pith:QXO7YUZ3

pith:2009:QXO7YUZ3LII7YUAJXGZ6B3JWSX

not attested not anchored not stored refs pending

Witnessing the assembly at z=1.6 of a galaxy cluster (GMASS ultradeep spectroscopy of galaxies at z~2 - V)

A. Cimatti, A. Franceschini, A. Renzini, C. Halliday, E. Daddi, G. Rodighiero, G. Zamorani, J. Kurk (MPIA, L. Pozzetti, M. Bolzonella, M. Dickinson, M. Mignoli, Oaa), P. Cassata, P. Rosati, S. Berta

arxiv:0906.4489 v1 · 2009-06-24 · 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{QXO7YUZ3LII7YUAJXGZ6B3JWSX}

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	2026-05-18T00:48:21.432340Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85ddfc533b5a11fc5009b9b3e0ed3695c61c463a61582627e70c344e732d3ee2

Aliases

arxiv: 0906.4489 · arxiv_version: 0906.4489v1 · doi: 10.48550/arxiv.0906.4489 · pith_short_12: QXO7YUZ3LII7 · pith_short_16: QXO7YUZ3LII7YUAJ · pith_short_8: QXO7YUZ3

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/QXO7YUZ3LII7YUAJXGZ6B3JWSX \
  | 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: 85ddfc533b5a11fc5009b9b3e0ed3695c61c463a61582627e70c344e732d3ee2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1923e6bb3e215ba1be7bea405921ee1fa17493580f06608fef7606ea1960f88",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-06-24T15:04:13Z",
    "title_canon_sha256": "18cf663c3893d97260fa0ca4e9beae080ca4a5d71401293e6ec93e318c05eeca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.4489",
    "kind": "arxiv",
    "version": 1
  }
}