Pith Number

pith:UUX5IRL2

pith:2021:UUX5IRL2IRIXKSVDBPVZ7GAWJW

not attested not anchored not stored refs pending

First light of a holographic aperture mask: Observation at the Keck OSIRIS Imager

Barnaby Norris, Christoph Keller, David S. Doelman, Frans Snik, Jim Lyke, Joost P. Wardenier, Michael J. Escuti, Michael P. Fitzgerald, N. Zane Warriner, Peter Tuthill, Steph Sallum

arxiv:2104.11210 v1 · 2021-04-22 · 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{UUX5IRL2IRIXKSVDBPVZ7GAWJW}

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	2026-07-05T02:45:28.098644Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a52fd4457a4451754aa30beb9f98164dab778815a1ba5694cb5fcc7f0cfd7920

Aliases

arxiv: 2104.11210 · arxiv_version: 2104.11210v1 · doi: 10.48550/arxiv.2104.11210 · pith_short_12: UUX5IRL2IRIX · pith_short_16: UUX5IRL2IRIXKSVD · pith_short_8: UUX5IRL2

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/UUX5IRL2IRIXKSVDBPVZ7GAWJW \
  | 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: a52fd4457a4451754aa30beb9f98164dab778815a1ba5694cb5fcc7f0cfd7920

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "31c7ce071a7cc21ba56cee71b3aecce11e3aaca1b02cb6c58fcc84d0d2ee21fa",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2021-04-22T17:46:19Z",
    "title_canon_sha256": "4406baea80b444aa8342c455c7aafb1604621c2bfaf6dc08a55fa1279cf56f3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.11210",
    "kind": "arxiv",
    "version": 1
  }
}