Pith Number

pith:OA545DOC

pith:2016:OA545DOCVL5VSXX3IAE3MKSDJQ

not attested not anchored not stored refs pending

Finding the Dark Hole with the Lights On: A New Approach to Focal Plane Wavefront Sensing

Richard A. Frazin

arxiv:1608.04616 v2 · 2016-08-16 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OA545DOCVL5VSXX3IAE3MKSDJQ}

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	2026-05-18T01:08:33.732879Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

703bce8dc2aafb595efb4009b62a434c2a750ecb94fa3f669b0cb61bdb4ecd4c

Aliases

arxiv: 1608.04616 · arxiv_version: 1608.04616v2 · doi: 10.48550/arxiv.1608.04616 · pith_short_12: OA545DOCVL5V · pith_short_16: OA545DOCVL5VSXX3 · pith_short_8: OA545DOC

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/OA545DOCVL5VSXX3IAE3MKSDJQ \
  | 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: 703bce8dc2aafb595efb4009b62a434c2a750ecb94fa3f669b0cb61bdb4ecd4c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e810d68d22d740340eb1b3135be38a3fbda139984fd315268cf88e8b0a90630c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2016-08-16T14:31:01Z",
    "title_canon_sha256": "5e95be1e0eef88474df483b07936a75a206f036d6e00867b3845ff64533a7002"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.04616",
    "kind": "arxiv",
    "version": 2
  }
}