Pith Number

pith:XGW5PE6U

pith:1995:XGW5PE6UVPDBT2B3K2LKLFSY3G

not attested not anchored not stored refs pending

Ages of galaxy bulges and disks from optical and near-infrared colours

Groningen, M. Balcells (Kapteyn Instituut, NL), R.F. Peletier

arxiv:astro-ph/9509123 v2 · 1995-09-25 · 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{XGW5PE6UVPDBT2B3K2LKLFSY3G}

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	2026-07-04T15:07:16.633942Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b9add793d4abc619e83b5696a59658d9abfa1cca5acbf8c109ccb2a488b64cc8

Aliases

arxiv: astro-ph/9509123 · arxiv_version: astro-ph/9509123v2 · doi: 10.48550/arxiv.astro-ph/9509123 · pith_short_12: XGW5PE6UVPDB · pith_short_16: XGW5PE6UVPDBT2B3 · pith_short_8: XGW5PE6U

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/XGW5PE6UVPDBT2B3K2LKLFSY3G \
  | 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: b9add793d4abc619e83b5696a59658d9abfa1cca5acbf8c109ccb2a488b64cc8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d5049996323a4ea40024fccc6d6d7ed6c76ac61394f480dedde23aba074c7c6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1995-09-25T13:13:47Z",
    "title_canon_sha256": "fafdbe621446f5a96b872cdbebbbbafd603f34e1de2800d30c6ec0577206bff4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9509123",
    "kind": "arxiv",
    "version": 2
  }
}