Pith Number

pith:3CZSWHUS

pith:2007:3CZSWHUSUQVFG4F7DYQQVNXI6R

not attested not anchored not stored refs pending

Optical Sky Brightness at Cerro Tololo Inter-American Observatory from 1992 to 2006

Dylan R. Semler, Hugo E. Schwarz, Joseph Richards, Kevin Krisciunas, Nicholas B. Suntzeff, Pedro Sanhueza, Sergio Vera

arxiv:0705.1153 v1 · 2007-05-08 · astro-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{3CZSWHUSUQVFG4F7DYQQVNXI6R}

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	2026-07-04T17:03:46.872436Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d8b32b1e92a42a5370bf1e210ab6e8f46dd9039e590eab5750d673c63cbc870b

Aliases

arxiv: 0705.1153 · arxiv_version: 0705.1153v1 · doi: 10.48550/arxiv.0705.1153 · pith_short_12: 3CZSWHUSUQVF · pith_short_16: 3CZSWHUSUQVFG4F7 · pith_short_8: 3CZSWHUS

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/3CZSWHUSUQVFG4F7DYQQVNXI6R \
  | 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: d8b32b1e92a42a5370bf1e210ab6e8f46dd9039e590eab5750d673c63cbc870b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ad54176d092eb480f989847307f13adf79465a6c8546a4bfe93bad879fc8e98",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-05-08T19:28:34Z",
    "title_canon_sha256": "f66bcaec330bdc0d72f0b1ea31bfe89a37925e1eb86a13ff13de20748acd7e5d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0705.1153",
    "kind": "arxiv",
    "version": 1
  }
}