Pith Number

pith:275UYZA7

pith:2018:275UYZA7AVXDBLTVSEMGSTVIPL

not attested not anchored not stored refs pending

HST/WFPC2 imaging analysis and Cloudy modelling of the multiple shell planetary nebulae NGC 3242, NGC 6826 and NGC 7662

Daniela Barria, Stefan Kimeswenger

arxiv:1807.01787 v1 · 2018-07-04 · 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{275UYZA7AVXDBLTVSEMGSTVIPL}

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	2026-05-18T00:09:58.348480Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7fb4c641f056e30ae759118694ea87affc8b0d445974fbc1a53180fe4a91f15

Aliases

arxiv: 1807.01787 · arxiv_version: 1807.01787v1 · doi: 10.48550/arxiv.1807.01787 · pith_short_12: 275UYZA7AVXD · pith_short_16: 275UYZA7AVXDBLTV · pith_short_8: 275UYZA7

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/275UYZA7AVXDBLTVSEMGSTVIPL \
  | 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: d7fb4c641f056e30ae759118694ea87affc8b0d445974fbc1a53180fe4a91f15

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7baa05f0107f1464752ae2676e976d99fc2a558407138b10c9294b39c47e4c3",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-07-04T21:28:35Z",
    "title_canon_sha256": "5bf5e9ba718d1e6d6c93985360f0862f41ca3010bf1c084d7e538d84befca2a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.01787",
    "kind": "arxiv",
    "version": 1
  }
}