Pith Number

pith:PHFQ4PRO

pith:2009:PHFQ4PRODWXVEIQ644YJKY3VOI

not attested not anchored not stored refs pending

Star Clusters in Pseudo-Bulges of Spiral Galaxies

Claudia Scarlata, C. Marcella Carollo, Daiana Di Nino, Massimo Stiavelli, Michele Trenti, Rosemary F. G. Wyse

arxiv:0909.1556 v1 · 2009-09-08 · 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{PHFQ4PRODWXVEIQ644YJKY3VOI}

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	2026-05-18T02:11:58.359640Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79cb0e3e2e1daf52221ee730956375722c9ea4c0be9e25220dff0891647058f8

Aliases

arxiv: 0909.1556 · arxiv_version: 0909.1556v1 · doi: 10.48550/arxiv.0909.1556 · pith_short_12: PHFQ4PRODWXV · pith_short_16: PHFQ4PRODWXVEIQ6 · pith_short_8: PHFQ4PRO

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/PHFQ4PRODWXVEIQ644YJKY3VOI \
  | 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: 79cb0e3e2e1daf52221ee730956375722c9ea4c0be9e25220dff0891647058f8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "690b5e7de0ddb795706e8ee297df671c8f4581d1b21efef2524d1ed9d14fd16e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-08T20:00:14Z",
    "title_canon_sha256": "066fa4186d09415b9585412c761c0fcf37f667bc02e8ff75447c99552905f7e6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1556",
    "kind": "arxiv",
    "version": 1
  }
}