Pith Number

pith:4ZCRF4VU

pith:2001:4ZCRF4VU7AHY6DZQ2BL5AW5NTN

not attested not anchored not stored refs pending

Radial Color Gradients in K+A Galaxies in Distant Clusters of Galaxies

Alejandro E. Gaba, James A. Rose, Lindsay J. Bartholomew, Nelson Caldwell

arxiv:astro-ph/0110568 v1 · 2001-10-26 · 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{4ZCRF4VU7AHY6DZQ2BL5AW5NTN}

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	2026-05-18T01:07:45.368124Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e64512f2b4f80f8f0f30d057d05bad9b77d7698bac788fc7070898922b745d82

Aliases

arxiv: astro-ph/0110568 · arxiv_version: astro-ph/0110568v1 · doi: 10.48550/arxiv.astro-ph/0110568 · pith_short_12: 4ZCRF4VU7AHY · pith_short_16: 4ZCRF4VU7AHY6DZQ · pith_short_8: 4ZCRF4VU

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/4ZCRF4VU7AHY6DZQ2BL5AW5NTN \
  | 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: e64512f2b4f80f8f0f30d057d05bad9b77d7698bac788fc7070898922b745d82

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f35d12435674fe6edf40c426d9248e0c6e00b8d5fe14d866b9dd243fd6b46f90",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-10-26T19:05:44Z",
    "title_canon_sha256": "8510c7fb9c7eab4f78948a4af3816be0d7d20d02a5807310ff2432d379dcf0d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0110568",
    "kind": "arxiv",
    "version": 1
  }
}