Pith Number

pith:T6UEAY6Z

pith:2010:T6UEAY6Z4AVGCZPJDYP76QXCY6

not attested not anchored not stored refs pending

Old open clusters and the Galactic metallicity gradient: Berkeley 20, Berkeley 66, and Tombaugh 2

Angela Bragaglia, Gianni Marconi, Gloria Andreuzzi, Monica Tosi

arxiv:1011.2349 v1 · 2010-11-10 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T6UEAY6Z4AVGCZPJDYP76QXCY6}

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	2026-05-18T02:04:49.346652Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9fa84063d9e02a6165e91e1fff42e2c7a5ce748d309a005a95409721d529e216

Aliases

arxiv: 1011.2349 · arxiv_version: 1011.2349v1 · doi: 10.48550/arxiv.1011.2349 · pith_short_12: T6UEAY6Z4AVG · pith_short_16: T6UEAY6Z4AVGCZPJ · pith_short_8: T6UEAY6Z

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/T6UEAY6Z4AVGCZPJDYP76QXCY6 \
  | 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: 9fa84063d9e02a6165e91e1fff42e2c7a5ce748d309a005a95409721d529e216

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "09eb080afe80f330523037c1705f803cf49a27a49c0c4170cec5e1eda215c7d3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2010-11-10T12:01:37Z",
    "title_canon_sha256": "1815d6c849d51abf868e4c8076eeef9e71418ea8d1eaafa3d4122298a1bf89ab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.2349",
    "kind": "arxiv",
    "version": 1
  }
}