Pith Number

pith:FQKLUT3Q

pith:2017:FQKLUT3QHYMWZJ7JIPHRGOT4SF

not attested not anchored not stored refs pending

Estimating the relative contribution of streetlights, vehicles and residential lighting to the urban night sky brightness

Alejandro S\'anchez de Miguel, \'Angel Rodr\'iguez-Ar\'os, Borja Tosar, Jaime Zamorano, Marcos P\'erez, Raul C. Lima, Salvador Bar\'a

arxiv:1706.04458 v2 · 2017-06-14 · 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{FQKLUT3QHYMWZJ7JIPHRGOT4SF}

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	2026-05-18T00:01:15.381834Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c14ba4f703e196ca7e943cf133a7c914925b97de72cebf616069229487f9aec

Aliases

arxiv: 1706.04458 · arxiv_version: 1706.04458v2 · doi: 10.48550/arxiv.1706.04458 · pith_short_12: FQKLUT3QHYMW · pith_short_16: FQKLUT3QHYMWZJ7J · pith_short_8: FQKLUT3Q

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/FQKLUT3QHYMWZJ7JIPHRGOT4SF \
  | 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: 2c14ba4f703e196ca7e943cf133a7c914925b97de72cebf616069229487f9aec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a43348e1a7c742957d06bcfc4bdff518806f1022d79e05d82c8c408c9eb1de91",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2017-06-14T12:53:57Z",
    "title_canon_sha256": "a406734caa7effac7a4050dbedd8776a18208e6366777382bf2657da49cc4b14"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.04458",
    "kind": "arxiv",
    "version": 2
  }
}