Pith Number

pith:LKI3U2V6

pith:2017:LKI3U2V6VKGT37YHSDFXPFTOPU

not attested not anchored not stored refs pending

Measuring night sky brightness: methods and challenges

Andreas H\"anel, Andreas Jechow, Chadwick Moore, Christopher C. M. Kyba, Dan Duriscoe, Dorien E. Lolkema, G\"unther Wuchterl, Henk Spoelstra, Martin Aub\'e, Norbert Schmidt, Salvador J. Ribas, Thomas Posch, Zolt\'an Kollath

arxiv:1709.09558 v1 · 2017-09-27 · 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{LKI3U2V6VKGT37YHSDFXPFTOPU}

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	2026-05-18T00:34:11.320376Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5a91ba6abeaa8d3dff0790cb77966e7d1111906baa8fa68471aa922a665a8f78

Aliases

arxiv: 1709.09558 · arxiv_version: 1709.09558v1 · doi: 10.48550/arxiv.1709.09558 · pith_short_12: LKI3U2V6VKGT · pith_short_16: LKI3U2V6VKGT37YH · pith_short_8: LKI3U2V6

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/LKI3U2V6VKGT37YHSDFXPFTOPU \
  | 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: 5a91ba6abeaa8d3dff0790cb77966e7d1111906baa8fa68471aa922a665a8f78

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "20222feb02f56cc81cbe223597b4de0acd804205f61524a00cf26d85c9329f2b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2017-09-27T14:46:43Z",
    "title_canon_sha256": "0d30ae1a0b751a4c1d22a3a33f343eb34b4c575efe85ae191c8d9410db71d3c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.09558",
    "kind": "arxiv",
    "version": 1
  }
}