Pith Number

pith:F3KKNGST

pith:2005:F3KKNGSTCD5JWLWHQ4QPGO5WMQ

not attested not anchored not stored refs pending

On quasar host galaxies as tests of non-cosmological redshifts

E. Zackrisson

arxiv:astro-ph/0506115 v1 · 2005-06-06 · 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{F3KKNGSTCD5JWLWHQ4QPGO5WMQ}

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	2026-07-04T16:52:30.165430Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ed4a69a5310fa9b2ec78720f33bb6641433d1bc6fc3c8f85392f053b5833ca1

Aliases

arxiv: astro-ph/0506115 · arxiv_version: astro-ph/0506115v1 · doi: 10.48550/arxiv.astro-ph/0506115 · pith_short_12: F3KKNGSTCD5J · pith_short_16: F3KKNGSTCD5JWLWH · pith_short_8: F3KKNGST

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/F3KKNGSTCD5JWLWHQ4QPGO5WMQ \
  | 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: 2ed4a69a5310fa9b2ec78720f33bb6641433d1bc6fc3c8f85392f053b5833ca1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d0b2447293dd64d708fc76786e2eac7af364f430f0bf2a213281c7abd06050f7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-06-06T16:00:18Z",
    "title_canon_sha256": "ecba318a9f4941f961942d75ded8de7298013dbb05a557809fc8b526893ba5a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0506115",
    "kind": "arxiv",
    "version": 1
  }
}