Pith Number

pith:XLTFW6ET

pith:2011:XLTFW6ETIDDCDBRC7MZO2KC33T

not attested not anchored not stored refs pending

Planetary Nebulae Populations in External Galaxies

Magda Arnaboldi

arxiv:1109.3308 v1 · 2011-09-15 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XLTFW6ETIDDCDBRC7MZO2KC33T}

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	2026-05-18T02:00:32.562996Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bae65b789340c6218622fb32ed285bdcf47d92f6106b8e69c65d7bf774461713

Aliases

arxiv: 1109.3308 · arxiv_version: 1109.3308v1 · doi: 10.48550/arxiv.1109.3308 · pith_short_12: XLTFW6ETIDDC · pith_short_16: XLTFW6ETIDDCDBRC · pith_short_8: XLTFW6ET

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/XLTFW6ETIDDCDBRC7MZO2KC33T \
  | 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: bae65b789340c6218622fb32ed285bdcf47d92f6106b8e69c65d7bf774461713

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8a7adb34c22b1dbdbdbdea13d4105efd364c5313fe9c992dfe89bbe96907e566",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-09-15T10:25:20Z",
    "title_canon_sha256": "de00bc544d48440c2f4e675464116692f32f11795ac2579c627c675680e96ac9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.3308",
    "kind": "arxiv",
    "version": 1
  }
}