Pith Number

pith:MYPLKQFA

pith:1997:MYPLKQFAWUXHMCRCGHX5M76LJC

not attested not anchored not stored refs pending

X-ray Shapes of Distant Clusters: the Connection to Blue Galaxy Fractions

Melville P. Ulmer, Q. Daniel Wang

arxiv:astro-ph/9702069 v1 · 1997-02-06 · 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{MYPLKQFAWUXHMCRCGHX5M76LJC}

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	2026-05-18T01:40:18.189203Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

661eb540a0b52e760a2231efd67fcb48ae23f383d457e1512743e944a42c02f8

Aliases

arxiv: astro-ph/9702069 · arxiv_version: astro-ph/9702069v1 · doi: 10.48550/arxiv.astro-ph/9702069 · pith_short_12: MYPLKQFAWUXH · pith_short_16: MYPLKQFAWUXHMCRC · pith_short_8: MYPLKQFA

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/MYPLKQFAWUXHMCRCGHX5M76LJC \
  | 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: 661eb540a0b52e760a2231efd67fcb48ae23f383d457e1512743e944a42c02f8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d33719917e6a811df37ee4c277a535ee8ca577139e882202b8fb0c1dd150ed46",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-02-06T22:11:57Z",
    "title_canon_sha256": "6cb874533a6e3874ad91bb5e6ea76217ad9fb02c0326f7ba4b349401a743db2b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9702069",
    "kind": "arxiv",
    "version": 1
  }
}