Pith Number

pith:HJTDWGPX

pith:2006:HJTDWGPXYLRTNT3LOOI4HUBG74

not attested not anchored not stored refs pending

HI studies of the Sculptor group galaxies. VIII. The background galaxies: NGC 24 and NGC 45

2), (2) Observatoire de Paris/GEPI, (3) Mount Stromlo Observatory), C. Carignan (1), K. C. Freeman (3) ((1) Universite de Montreal, L. Chemin (1, N. Drouin (1)

arxiv:astro-ph/0609148 v1 · 2006-09-06 · 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{HJTDWGPXYLRTNT3LOOI4HUBG74}

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	2026-05-18T04:36:20.976955Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3a663b19f7c2e336cf6b7391c3d026ff0291820ed5b272b68dcc3c650b19be09

Aliases

arxiv: astro-ph/0609148 · arxiv_version: astro-ph/0609148v1 · doi: 10.48550/arxiv.astro-ph/0609148 · pith_short_12: HJTDWGPXYLRT · pith_short_16: HJTDWGPXYLRTNT3L · pith_short_8: HJTDWGPX

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/HJTDWGPXYLRTNT3LOOI4HUBG74 \
  | 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: 3a663b19f7c2e336cf6b7391c3d026ff0291820ed5b272b68dcc3c650b19be09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eff7b2f56747dbc345fe32c9ae6b2b7d80eeab3786c4710cfef32b8ef8bbf7fa",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-09-06T10:04:13Z",
    "title_canon_sha256": "7a978101f10d70a0cdbe4f99097464de23ce02faa3b442acd571d972e7918e94"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0609148",
    "kind": "arxiv",
    "version": 1
  }
}