Pith Number

pith:CKPQZH27

pith:1997:CKPQZH27KNQTSJCTM4SP72OK6G

not attested not anchored not stored refs pending

Extraplanar Dust in the Edge-On Spiral NGC 891

Blair D. Savage (Univ. of Wisconsin), J. Christopher Howk

arxiv:astro-ph/9709197 v1 · 1997-09-19 · 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{CKPQZH27KNQTSJCTM4SP72OK6G}

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	2026-07-04T15:43:08.369065Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

129f0c9f5f53613924536724ffe9caf1b01cf183c08d11902cb70dc5d0dde4a1

Aliases

arxiv: astro-ph/9709197 · arxiv_version: astro-ph/9709197v1 · doi: 10.48550/arxiv.astro-ph/9709197 · pith_short_12: CKPQZH27KNQT · pith_short_16: CKPQZH27KNQTSJCT · pith_short_8: CKPQZH27

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/CKPQZH27KNQTSJCTM4SP72OK6G \
  | 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: 129f0c9f5f53613924536724ffe9caf1b01cf183c08d11902cb70dc5d0dde4a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c874fb6c5cc0fd8691f3e911a5bd20480554601ecc5555eecac5b17ca2279783",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-09-19T19:03:57Z",
    "title_canon_sha256": "748ada5719672eac156a1e637d7f19b7072575e20c0682503e8825aacaf16620"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9709197",
    "kind": "arxiv",
    "version": 1
  }
}