Pith Number

pith:YKMED762

pith:2004:YKMED762GANQDIQ33IG63ZS5OP

not attested not anchored not stored refs pending

Internal colour gradients for E/S0 galaxies in Abell 2218

Matthew Colless, Michael Pracy, Roberto De Propris, Simon Driver, Warrick Couch

arxiv:astro-ph/0411646 v1 · 2004-11-23 · 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{YKMED762GANQDIQ33IG63ZS5OP}

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	2026-05-18T04:27:04.386754Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c29841ffda301b01a21bda0dede65d73cd37b083d291866fb733f950d7a90653

Aliases

arxiv: astro-ph/0411646 · arxiv_version: astro-ph/0411646v1 · doi: 10.48550/arxiv.astro-ph/0411646 · pith_short_12: YKMED762GANQ · pith_short_16: YKMED762GANQDIQ3 · pith_short_8: YKMED762

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/YKMED762GANQDIQ33IG63ZS5OP \
  | 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: c29841ffda301b01a21bda0dede65d73cd37b083d291866fb733f950d7a90653

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "538f9bfa00a4525fd4b5c30ec873c50c65a3fdd86882e703cf4e9aaa6362bb13",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-11-23T17:53:44Z",
    "title_canon_sha256": "52696ef2571bcd12278a201de1046bd59348c220986d708c6890f623331c0cd8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0411646",
    "kind": "arxiv",
    "version": 1
  }
}