Pith Number

pith:KDDI7F3H

pith:2013:KDDI7F3H3T3XEA4KUBNLPIHRQO

not attested not anchored not stored refs pending

DONUTS: A science frame autoguiding algorithm with sub-pixel precision, capable of guiding on defocused stars

2, (2) University of Warwick, 3), (3) Astrophysics Research Centre, Belfast, C. A. Watson (3) ((1) Isaac Newton Group of Telescopes, Coventry, D. Pollacco (2), F. Faedi (2), I. Skillen (1), I. Todd (3), J. McCormac (1, Queens University, Santa Cruz de La Palma, Spain, UK, UK)

arxiv:1304.2405 v1 · 2013-04-08 · astro-ph.IM · astro-ph.EP · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KDDI7F3H3T3XEA4KUBNLPIHRQO}

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	2026-05-18T01:50:41.390399Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

50c68f9767dcf772038aa05ab7a0f183a969824d7a87a610cddcba4e36d50ae4

Aliases

arxiv: 1304.2405 · arxiv_version: 1304.2405v1 · doi: 10.48550/arxiv.1304.2405 · pith_short_12: KDDI7F3H3T3X · pith_short_16: KDDI7F3H3T3XEA4K · pith_short_8: KDDI7F3H

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/KDDI7F3H3T3XEA4KUBNLPIHRQO \
  | 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: 50c68f9767dcf772038aa05ab7a0f183a969824d7a87a610cddcba4e36d50ae4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ec9aba494ef0d07ed0307f71cde992e5cfc2b64bccbb4a92a04aa5d30cb14b6",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2013-04-08T20:03:54Z",
    "title_canon_sha256": "9a76ffe8bc9c166b1be7a061ae54f583bc71d5254f7599aeaea7f83ac666742e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2405",
    "kind": "arxiv",
    "version": 1
  }
}