Pith Number

pith:QOWS6CYY

pith:2009:QOWS6CYYV57KG7RY3QLRMZUDF6

not attested not anchored not stored refs pending

Mass-to-Light Ratios for M31 Globular Clusters: Age-Dating and a Surprising Metallicity Trend

Graeme Smith (UCO/Lick), Jay Strader (CfA), Jean Brodie (UCO/Lick), John Huchra (CfA), Soeren Larsen (Utrecht)

arxiv:0906.0397 v1 · 2009-06-02 · astro-ph.GA · 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{QOWS6CYYV57KG7RY3QLRMZUDF6}

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	2026-05-18T02:13:29.932792Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83ad2f0b18af7ea37e38dc171666832fb06fa5d39aac3dd8fd8675c7e899d602

Aliases

arxiv: 0906.0397 · arxiv_version: 0906.0397v1 · doi: 10.48550/arxiv.0906.0397 · pith_short_12: QOWS6CYYV57K · pith_short_16: QOWS6CYYV57KG7RY · pith_short_8: QOWS6CYY

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/QOWS6CYYV57KG7RY3QLRMZUDF6 \
  | 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: 83ad2f0b18af7ea37e38dc171666832fb06fa5d39aac3dd8fd8675c7e899d602

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "694b16439fcc99f80e583c6bf569d021bf340d6e57711b3fb81e82af9ac348e0",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-06-02T19:55:38Z",
    "title_canon_sha256": "11881b4898d757a9671afada89e188fa6e87b0835477e871e979acbc86c319fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.0397",
    "kind": "arxiv",
    "version": 1
  }
}