Pith Number

pith:PSDNLQQW

pith:2020:PSDNLQQWJAIFF3765XSBDCN6Q5

not attested not anchored not stored refs pending

Effects of the COVID-19 lockdown on urban light emissions: ground and satellite comparison

Alejandro S\'anchez de Miguel, Alicia Pelegrina, Antonio Garc\'ia, Jaime Zamorano, J.M. V\'ilchez, Jonathan Bennie, Jose-Luis Ortiz, Kevin J. Gaston, M\'aximo Bustamante-Calabria, Susana Mart\'in-Ruiz

arxiv:2011.09252 v1 · 2020-11-18 · astro-ph.IM · astro-ph.EP · physics.soc-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{PSDNLQQWJAIFF3765XSBDCN6Q5}

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	2026-07-05T02:06:53.114674Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c86d5c216481052effeede41189be87668fb764ebc8a93da3f5728a9ae655b6

Aliases

arxiv: 2011.09252 · arxiv_version: 2011.09252v1 · doi: 10.48550/arxiv.2011.09252 · pith_short_12: PSDNLQQWJAIF · pith_short_16: PSDNLQQWJAIFF376 · pith_short_8: PSDNLQQW

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/PSDNLQQWJAIFF3765XSBDCN6Q5 \
  | 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: 7c86d5c216481052effeede41189be87668fb764ebc8a93da3f5728a9ae655b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ade997a34c902d0794c47839fd8a3a99e97caba0072a571dbbad23e71bed7fc1",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "physics.soc-ph"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2020-11-18T12:57:31Z",
    "title_canon_sha256": "81d3dd9f0b75d75db71468b62428c0d5133e4ec1f05b945f7def2561dd21cd75"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2011.09252",
    "kind": "arxiv",
    "version": 1
  }
}