Pith Number

pith:BUHKPII3

pith:2016:BUHKPII3D64AXPBNELBQCWHKRG

not attested not anchored not stored refs pending

The Hong Kong/AAO/Strasbourg Halpha (HASH) Planetary Nebula Database

D. J. Frew, I. S. Bojicic, Q. A. Parker

arxiv:1612.01521 v1 · 2016-12-05 · astro-ph.IM · astro-ph.GA · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BUHKPII3D64AXPBNELBQCWHKRG}

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	2026-05-18T00:30:46.432759Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d0ea7a11b1fb80bbc2d22c30158ea898a1c20f816b9a70205ee1df0b28efbbd

Aliases

arxiv: 1612.01521 · arxiv_version: 1612.01521v1 · doi: 10.48550/arxiv.1612.01521 · pith_short_12: BUHKPII3D64A · pith_short_16: BUHKPII3D64AXPBN · pith_short_8: BUHKPII3

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/BUHKPII3D64AXPBNELBQCWHKRG \
  | 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: 0d0ea7a11b1fb80bbc2d22c30158ea898a1c20f816b9a70205ee1df0b28efbbd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d25ac482fa0b805b3ec990fab9ce9d61b58837f29bfecec3f99036c573bd8102",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2016-12-05T06:36:57Z",
    "title_canon_sha256": "1f3b45299e762d67e110c48af302d0fcf6833d5c371b281def012ec6a6eeda8e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.01521",
    "kind": "arxiv",
    "version": 1
  }
}