Pith Number

pith:J3N4MRW6

pith:2021:J3N4MRW6MO6TWFB6SEJWNXQAFC

not attested not anchored not stored refs pending

The Santa Cruz Extreme AO Lab (SEAL): Design and First Light

Benjamin Gerard, Cesar Laguna, Daren Dillon, David Doelman, Dominic Sanchez, Frans Snik, J. Fowler, M.A.M. van Kooten, Phil Hinz, Rebecca Jensen-Clem, Renate Kupke, Sylvain Cetre

arxiv:2109.03318 v1 · 2021-09-07 · 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{J3N4MRW6MO6TWFB6SEJWNXQAFC}

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	2026-07-05T03:12:29.637296Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4edbc646de63bd3b143e911366de0028bbafb35fcf0491c638761fadec9a213f

Aliases

arxiv: 2109.03318 · arxiv_version: 2109.03318v1 · doi: 10.48550/arxiv.2109.03318 · pith_short_12: J3N4MRW6MO6T · pith_short_16: J3N4MRW6MO6TWFB6 · pith_short_8: J3N4MRW6

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/J3N4MRW6MO6TWFB6SEJWNXQAFC \
  | 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: 4edbc646de63bd3b143e911366de0028bbafb35fcf0491c638761fadec9a213f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "850f7d4b93e62f6e5fd969bfbc2639d2d020de3e9f76a358a693094850f59725",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2021-09-07T20:32:42Z",
    "title_canon_sha256": "93bdf012475c3b18f4f42a951f2fca548e6ec6e431c8e1db8cdb9076bbf1542f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.03318",
    "kind": "arxiv",
    "version": 1
  }
}