Pith Number

pith:PXUQL2WT

pith:2019:PXUQL2WTB3ZFXCYWHUHR6LDECK

not attested not anchored not stored refs pending

Sky Brightness Measurements and Ways to Mitigate Light Pollution in Kirksville, Missouri

Ashley Herdmann, David Caples, Emily Wren, Eric Hilker, James Tompkins, Jordan Goins, Vayujeet Gokhale

arxiv:1908.05234 v1 · 2019-08-14 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PXUQL2WTB3ZFXCYWHUHR6LDECK}

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	2026-07-04T23:56:37.771819Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7de905ead30ef25b8b163d0f1f2c641295b6ef57e9f3ab3554753f5e3ce456fa

Aliases

arxiv: 1908.05234 · arxiv_version: 1908.05234v1 · doi: 10.48550/arxiv.1908.05234 · pith_short_12: PXUQL2WTB3ZF · pith_short_16: PXUQL2WTB3ZFXCYW · pith_short_8: PXUQL2WT

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/PXUQL2WTB3ZFXCYWHUHR6LDECK \
  | 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: 7de905ead30ef25b8b163d0f1f2c641295b6ef57e9f3ab3554753f5e3ce456fa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5b3d3cb9d2f55c3877f6a5a06c1f83d21370ae1d9d32f52db0ee47ba96296fe",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-08-14T17:04:07Z",
    "title_canon_sha256": "d897d8e750a34c9b6ca16e0dfd78beae4d3d6954cfe0c34f396f5cf9d091f5c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.05234",
    "kind": "arxiv",
    "version": 1
  }
}