Pith Number

pith:FY5BSSZU

pith:1997:FY5BSSZU5RXMS4WJEKTCR37GMX

not attested not anchored not stored refs pending

Where do the disks of spiral galaxies end?

J. Bland-Hawthorn (AAO), K.C. Freeman (MSSSO), P.J. Quinn (ESO)

arxiv:astro-ph/9706210 v2 · 1997-06-20 · 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{FY5BSSZU5RXMS4WJEKTCR37GMX}

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	2026-07-04T16:03:04.544960Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2e3a194b34ec6ec972c922a628efe665e5cce15b14c2867888ab89c396384a61

Aliases

arxiv: astro-ph/9706210 · arxiv_version: astro-ph/9706210v2 · doi: 10.48550/arxiv.astro-ph/9706210 · pith_short_12: FY5BSSZU5RXM · pith_short_16: FY5BSSZU5RXMS4WJ · pith_short_8: FY5BSSZU

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/FY5BSSZU5RXMS4WJEKTCR37GMX \
  | 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: 2e3a194b34ec6ec972c922a628efe665e5cce15b14c2867888ab89c396384a61

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d2ce22a1d90765ff88c77582a01e3bc0bcf87395c85e7444c8b221324cfab29",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-06-20T01:54:47Z",
    "title_canon_sha256": "b234d538e84faaabf0ada9b1618893cf5c58f711ebbde8c8d6e8056dd938e814"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9706210",
    "kind": "arxiv",
    "version": 2
  }
}