Pith Number

pith:A4Z2XGUR

pith:2009:A4Z2XGURYCJGJ72V7KR3UL3HDE

not attested not anchored not stored refs pending

Search For Companions Of Nearby Isolated Galaxies

D. I. Makarov, I. D. Karachentsev, I. V. Chilingarian, O. V. Melnyk, V. E. Karachentseva

arxiv:0906.1493 v1 · 2009-06-08 · astro-ph.CO · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{A4Z2XGURYCJGJ72V7KR3UL3HDE}

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	2026-05-18T02:13:21.619446Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0733ab9a91c09264ff55faa3ba2f67192b108f39e1b77478bf4a41f2e460bed5

Aliases

arxiv: 0906.1493 · arxiv_version: 0906.1493v1 · doi: 10.48550/arxiv.0906.1493 · pith_short_12: A4Z2XGURYCJG · pith_short_16: A4Z2XGURYCJGJ72V · pith_short_8: A4Z2XGUR

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/A4Z2XGURYCJGJ72V7KR3UL3HDE \
  | 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: 0733ab9a91c09264ff55faa3ba2f67192b108f39e1b77478bf4a41f2e460bed5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "131a93c12c26d7c748fade97c5c3883ba769e7e8dd8dbdd42f7b38353f090786",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-06-08T13:46:00Z",
    "title_canon_sha256": "6616546bbb076cd00da34c963f9b3cd725fa347c4a0f97d65b48d522bab05a6e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.1493",
    "kind": "arxiv",
    "version": 1
  }
}