Pith Number

pith:ILUVAD5Q

pith:2022:ILUVAD5QRF3I3MTRCFZXT7KEQG

not attested not anchored not stored refs pending

Long-term trends of light pollution assessed from SQM measurements and an empirical atmospheric model

Axel Schwope, Johannes Puschnig, Magnus N\"aslund, Stefan Wallner

arxiv:2210.09177 v1 · 2022-10-17 · astro-ph.IM · astro-ph.EP · physics.ao-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ILUVAD5QRF3I3MTRCFZXT7KEQG}

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	2026-07-05T05:10:17.580262Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

42e9500fb089768db271117379fd4481878f810013e247bf00c13098d87ee48b

Aliases

arxiv: 2210.09177 · arxiv_version: 2210.09177v1 · doi: 10.48550/arxiv.2210.09177 · pith_short_12: ILUVAD5QRF3I · pith_short_16: ILUVAD5QRF3I3MTR · pith_short_8: ILUVAD5Q

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/ILUVAD5QRF3I3MTRCFZXT7KEQG \
  | 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: 42e9500fb089768db271117379fd4481878f810013e247bf00c13098d87ee48b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1556c961467712bedd5b4ea752fe6111707c3ba00439697d80a17be8f709581c",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "physics.ao-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2022-10-17T15:26:46Z",
    "title_canon_sha256": "8e39b46d6d43a9346ea0df14d8d47d2181526380331dd8ad106d75b2809d61f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2210.09177",
    "kind": "arxiv",
    "version": 1
  }
}