Pith Number

pith:KIAEGZCC

pith:2000:KIAEGZCC5V4PDJGGUOEUT5CF6K

not attested not anchored not stored refs pending

A Photometric Study of the Ages and Metallicities of Early-type Galaxies in A2218

A.S. Fruchter & R.N. Hook, C. Packham, G.P. Smith, Harald Kuntschner, Ian Smail, T. Kodama

arxiv:astro-ph/0008160 v1 · 2000-08-10 · 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{KIAEGZCC5V4PDJGGUOEUT5CF6K}

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	2026-05-18T01:40:47.408825Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5200436442ed78f1a4c6a38949f445f295549987c77afe7a9d860fcfa06ca43a

Aliases

arxiv: astro-ph/0008160 · arxiv_version: astro-ph/0008160v1 · doi: 10.48550/arxiv.astro-ph/0008160 · pith_short_12: KIAEGZCC5V4P · pith_short_16: KIAEGZCC5V4PDJGG · pith_short_8: KIAEGZCC

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/KIAEGZCC5V4PDJGGUOEUT5CF6K \
  | 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: 5200436442ed78f1a4c6a38949f445f295549987c77afe7a9d860fcfa06ca43a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5910236022ced44d41f6dfbe797f734f64969b24574f269a37ef780f97b992d7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-08-10T07:42:01Z",
    "title_canon_sha256": "ec1eeb8d174f4764426ad5a9c34d693b347028a800559cd1f2ea7669567bc5de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0008160",
    "kind": "arxiv",
    "version": 1
  }
}