Pith Number

pith:DN6VNU7O

pith:2009:DN6VNU7OGZ7FO5HCARQDYCTMIK

not attested not anchored not stored refs pending

A Two-Colour CCD Survey of the North Celestial Cap: I. The Method

Cristina Afonso, Evgeny Gorbikov, Noah Brosch

arxiv:0912.2355 v1 · 2009-12-11 · astro-ph.IM · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DN6VNU7OGZ7FO5HCARQDYCTMIK}

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	2026-05-18T02:33:56.758752Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b7d56d3ee367e5774e204603c0a6c42a2797800aafdaac9ba39e6c87f81648c

Aliases

arxiv: 0912.2355 · arxiv_version: 0912.2355v1 · doi: 10.48550/arxiv.0912.2355 · pith_short_12: DN6VNU7OGZ7F · pith_short_16: DN6VNU7OGZ7FO5HC · pith_short_8: DN6VNU7O

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/DN6VNU7OGZ7FO5HCARQDYCTMIK \
  | 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: 1b7d56d3ee367e5774e204603c0a6c42a2797800aafdaac9ba39e6c87f81648c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "043c2b73cfa07e2e6de1f64b47b5ebaba8da1e36c7dfd5af53dc80c0527adec3",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2009-12-11T21:10:34Z",
    "title_canon_sha256": "31114c32a9573c3257467aed4e5bc34d05b0c45b50707a2f7ae397e4bade2c32"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2355",
    "kind": "arxiv",
    "version": 1
  }
}