Pith Number

pith:W4K6L3S3

pith:2015:W4K6L3S3TEFQFSULZ5CK4BWAWV

not attested not anchored not stored refs pending

Testing sky brightness models against radial dependency: a dense two dimensional survey around the city of Madrid, Spain

Alberto Fernandez, Alejandro S\'anchez de Miguel, Berenice Pila-Diez, Carlos Tapia, Francisco Oca\~na, Jaime Zamorano, Jes\'us Gallego, Jos\'e G\'omez Casta\~no, Miguel Nievas, Sergio Pascual

arxiv:1512.06694 v1 · 2015-12-21 · 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{W4K6L3S3TEFQFSULZ5CK4BWAWV}

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	2026-05-18T01:20:03.222593Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b715e5ee5b990b02ca8bcf44ae06c0b570a6c8e7bd2462196755178577adc9ed

Aliases

arxiv: 1512.06694 · arxiv_version: 1512.06694v1 · doi: 10.48550/arxiv.1512.06694 · pith_short_12: W4K6L3S3TEFQ · pith_short_16: W4K6L3S3TEFQFSUL · pith_short_8: W4K6L3S3

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/W4K6L3S3TEFQFSULZ5CK4BWAWV \
  | 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: b715e5ee5b990b02ca8bcf44ae06c0b570a6c8e7bd2462196755178577adc9ed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b63ec8ec738ae659322e6db256586e633d2cff3c5313a801fcedc6b77eff8c6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2015-12-21T16:48:02Z",
    "title_canon_sha256": "650d57b5d7deeea3a2eb646cf393f12fc9c503bb1b615e0daa54a5261db13100"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.06694",
    "kind": "arxiv",
    "version": 1
  }
}