Pith Number

pith:PDPXXA5I

pith:2011:PDPXXA5IFYVXFEA7F3MWCTRFRZ

not attested not anchored not stored refs pending

Spectra of globular clusters in the Sombrero galaxy: evidence for spectroscopic metallicity bimodality

Alan Alves-Brito, Duncan A. Forbes, George K.T. Hau, Jay Strader, Jean P. Brodie, Katherine L. Rhode, Lee R. Spitler

arxiv:1107.0757 v1 · 2011-07-04 · 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{PDPXXA5IFYVXFEA7F3MWCTRFRZ}

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	2026-05-18T02:01:24.906269Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78df7b83a82e2b72901f2ed9614e258e436719b50d7b10a795c0a1e6f492f0a8

Aliases

arxiv: 1107.0757 · arxiv_version: 1107.0757v1 · doi: 10.48550/arxiv.1107.0757 · pith_short_12: PDPXXA5IFYVX · pith_short_16: PDPXXA5IFYVXFEA7 · pith_short_8: PDPXXA5I

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/PDPXXA5IFYVXFEA7F3MWCTRFRZ \
  | 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: 78df7b83a82e2b72901f2ed9614e258e436719b50d7b10a795c0a1e6f492f0a8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d7ea8c7df8c4baf0fa82d1e46a6cb50eb5f8f65c38a8be1352d95375e87f886",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-07-04T23:29:21Z",
    "title_canon_sha256": "bcb685797a91bdabab1754f960e804f10cde14e9b388376a0437a3a12637f93d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.0757",
    "kind": "arxiv",
    "version": 1
  }
}