Pith Number

pith:Q6G2SUMP

pith:2012:Q6G2SUMP7WEWAVF5WMZWJ2FTCH

not attested not anchored not stored refs pending

Atmospheric Extinction Coefficients and Night Sky Brightness At the Xuyi Observational Station

H.-B. Yuan, H.-B. Zhao, H.-H Zhang, H.-W. Zhang, J.-S. Yao, M.-S. Xiang, X.-W. Liu

arxiv:1211.4672 v1 · 2012-11-20 · 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{Q6G2SUMP7WEWAVF5WMZWJ2FTCH}

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	2026-05-18T01:53:02.630857Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

878da9518ffd896054bdb33364e8b311d3a4b1f5cb03a75595ace9a874b15f83

Aliases

arxiv: 1211.4672 · arxiv_version: 1211.4672v1 · doi: 10.48550/arxiv.1211.4672 · pith_short_12: Q6G2SUMP7WEW · pith_short_16: Q6G2SUMP7WEWAVF5 · pith_short_8: Q6G2SUMP

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/Q6G2SUMP7WEWAVF5WMZWJ2FTCH \
  | 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: 878da9518ffd896054bdb33364e8b311d3a4b1f5cb03a75595ace9a874b15f83

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a64b48052fc1835d2b585bf486d5a1858c0afa8adc713cae5fe96b91fdf42e02",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2012-11-20T07:03:58Z",
    "title_canon_sha256": "852668b5d284aab812e0efc5198419664aac084027e6f95723f523aa6f92bb6c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.4672",
    "kind": "arxiv",
    "version": 1
  }
}