Pith Number

pith:2TKO5UWX

pith:1999:2TKO5UWXR4H5VASWA55WG7XDPI

not attested not anchored not stored refs pending

Population Gradients in Galaxy Clusters at 0.2 < Z < 0.6

E. Ellingson, H. K. C. Yee, H. Lin, R. G. Carlberg

arxiv:astro-ph/9909074 v1 · 1999-09-03 · 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{2TKO5UWXR4H5VASWA55WG7XDPI}

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	2026-07-04T14:17:05.370195Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4d4eed2d78f0fda8256077b637ee37a1d0f1f013dcc464fecd57179c4bcec00

Aliases

arxiv: astro-ph/9909074 · arxiv_version: astro-ph/9909074v1 · doi: 10.48550/arxiv.astro-ph/9909074 · pith_short_12: 2TKO5UWXR4H5 · pith_short_16: 2TKO5UWXR4H5VASW · pith_short_8: 2TKO5UWX

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/2TKO5UWXR4H5VASWA55WG7XDPI \
  | 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: d4d4eed2d78f0fda8256077b637ee37a1d0f1f013dcc464fecd57179c4bcec00

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a8132105e4ed0b2c15c1945ab7c557ad4831768234dd98a739106443395db3b5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-09-03T16:30:26Z",
    "title_canon_sha256": "b3433a417503627853df7518a5b94517ff281a737f198b084d89a1a94337c3f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9909074",
    "kind": "arxiv",
    "version": 1
  }
}