Pith Number

pith:KFA74KHF

pith:2009:KFA74KHFB2RIH5AEKKO2EOMQP5

not attested not anchored not stored refs pending

Pupil remapping for high contrast astronomy: results from an optical testbed

G. Perrin, G. Robertson, P. Tuthill, S. Lacour, T. Kotani

arxiv:0901.2165 v1 · 2009-01-15 · astro-ph.IM · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KFA74KHFB2RIH5AEKKO2EOMQP5}

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	2026-05-18T02:14:57.353393Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5141fe28e50ea283f404529da239907f4b74c1188c19653d08068d902806a715

Aliases

arxiv: 0901.2165 · arxiv_version: 0901.2165v1 · doi: 10.48550/arxiv.0901.2165 · pith_short_12: KFA74KHFB2RI · pith_short_16: KFA74KHFB2RIH5AE · pith_short_8: KFA74KHF

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/KFA74KHFB2RIH5AEKKO2EOMQP5 \
  | 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: 5141fe28e50ea283f404529da239907f4b74c1188c19653d08068d902806a715

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5f895efb17ad0e6c93af7de6c231f2a6d04a2639dd0c5e9e1a7bee4a3390b1fd",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2009-01-15T02:08:55Z",
    "title_canon_sha256": "9072408a4c788e99c40d819e4f45d8962d2e8982c8e95cd979ee3a196cde65cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.2165",
    "kind": "arxiv",
    "version": 1
  }
}