Pith Number

pith:W4WTM4QS

pith:2011:W4WTM4QSFWDJ4F2JFY3HSVAWMV

not attested not anchored not stored refs pending

Photoionization modeling of the Galactic planetary nebulae Abell 39 and NGC 7027

Ashkbiz Danehkar, David J. Frew, Orsola De Marco, Quentin A. Parker

arxiv:1112.3184 v1 · 2011-12-14 · 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{W4WTM4QSFWDJ4F2JFY3HSVAWMV}

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	2026-05-18T03:46:03.619811Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b72d3672122d869e17492e367954166547642a6f3b7f9cf2009f82dec4d242ce

Aliases

arxiv: 1112.3184 · arxiv_version: 1112.3184v1 · doi: 10.48550/arxiv.1112.3184 · pith_short_12: W4WTM4QSFWDJ · pith_short_16: W4WTM4QSFWDJ4F2J · pith_short_8: W4WTM4QS

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/W4WTM4QSFWDJ4F2JFY3HSVAWMV \
  | 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: b72d3672122d869e17492e367954166547642a6f3b7f9cf2009f82dec4d242ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5afb5e1cf6bf30a799acfbc63fa77b09f14aec9a9344ed9855693d58dfcff7c0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-12-14T12:20:24Z",
    "title_canon_sha256": "9094f7f07506fd7861e919ecd9a3026d8777ff1bd32c7ff2cc710eee2d04bf43"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.3184",
    "kind": "arxiv",
    "version": 1
  }
}