Pith Number

pith:WUTEIN2A

pith:1999:WUTEIN2ATC7SZY7GEK4TBVA3J4

not attested not anchored not stored refs pending

The Color-Magnitude Relation of Early-Type Galaxies: A Tool for Cluster Finding and Redshift Determination

H.K.C. Yee, M.D. Gladders (Univ. of Toronto), O. Lopez-Cruz (INAOE)

arxiv:astro-ph/9908001 v1 · 1999-07-30 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WUTEIN2ATC7SZY7GEK4TBVA3J4}

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	2026-07-04T14:17:01.423676Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b52644374098bf2ce3e622b930d41b4f0beebb0d352ca5b8abe722109b8fb149

Aliases

arxiv: astro-ph/9908001 · arxiv_version: astro-ph/9908001v1 · doi: 10.48550/arxiv.astro-ph/9908001 · pith_short_12: WUTEIN2ATC7S · pith_short_16: WUTEIN2ATC7SZY7G · pith_short_8: WUTEIN2A

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/WUTEIN2ATC7SZY7GEK4TBVA3J4 \
  | 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: b52644374098bf2ce3e622b930d41b4f0beebb0d352ca5b8abe722109b8fb149

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "81f30fe01793c5d96d958ee3b4fb73cca2cb1ffb34c08be0815dcaf50507f8f6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-07-30T23:35:29Z",
    "title_canon_sha256": "755bdac0c6c2f8696ce19ada2202439994770e89a22cbc9ef13f5b2f97141105"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9908001",
    "kind": "arxiv",
    "version": 1
  }
}