Pith Number

pith:HHZXI4FL

pith:2019:HHZXI4FLPBFWL4DRMEI6IJYKLJ

not attested not anchored not stored refs pending

A high-mass Planetary Nebula in a Galactic Open Cluster

Albert Zijlstra, Helen Barker, Lisa Crause, Quentin Parker, Vasiliki Fragkou

arxiv:1906.10556 v1 · 2019-06-25 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HHZXI4FLPBFWL4DRMEI6IJYKLJ}

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	2026-05-17T23:42:15.999621Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

39f37470ab784b65f0716111e4270a5a6e5fa838b0c40816ba7222743a8b870d

Aliases

arxiv: 1906.10556 · arxiv_version: 1906.10556v1 · doi: 10.48550/arxiv.1906.10556 · pith_short_12: HHZXI4FLPBFW · pith_short_16: HHZXI4FLPBFWL4DR · pith_short_8: HHZXI4FL

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/HHZXI4FLPBFWL4DRMEI6IJYKLJ \
  | 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: 39f37470ab784b65f0716111e4270a5a6e5fa838b0c40816ba7222743a8b870d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d34c1a16ac2fc51782403914bbd26d7fa2493272ae45656f352e34e7ad582ab7",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-06-25T14:12:50Z",
    "title_canon_sha256": "42df8bbb91b5e051b356e29dd8eb6d39496e9bdcaa88fa782bb021355978b145"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.10556",
    "kind": "arxiv",
    "version": 1
  }
}