Pith Number

pith:LK4ZTTDB

pith:2021:LK4ZTTDBUKPJGO6TSLTXLMSFKN

not attested not anchored not stored refs pending

Enhancing Direct Exoplanet Spectroscopy with Apodizing and Beam Shaping Optics

Benjamin Calvin, Daniel Echeverri, Dimitri Mawet, Garreth Ruane, Jacklyn Pezzato, Jacques-Robert Delorme, Jennah Colborn, J. Kent Wallace, Michael Porter, Nemanja Jovanovic, Tobias Schofield

arxiv:2102.11499 v1 · 2021-02-23 · 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{LK4ZTTDBUKPJGO6TSLTXLMSFKN}

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	2026-07-05T02:17:51.466848Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5ab999cc61a29e933bd392e775b245537aafe3450ec523d4b656bbd44263a997

Aliases

arxiv: 2102.11499 · arxiv_version: 2102.11499v1 · doi: 10.48550/arxiv.2102.11499 · pith_short_12: LK4ZTTDBUKPJ · pith_short_16: LK4ZTTDBUKPJGO6T · pith_short_8: LK4ZTTDB

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/LK4ZTTDBUKPJGO6TSLTXLMSFKN \
  | 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: 5ab999cc61a29e933bd392e775b245537aafe3450ec523d4b656bbd44263a997

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c8f08fddb106933178a508d530b37ccf5ba12ef88b198c207de72bda3b8e2a35",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2021-02-23T05:21:45Z",
    "title_canon_sha256": "94fb5f175a9894d78ed41ca027d6f78b9faccdeeead2a439641c47ea56812892"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.11499",
    "kind": "arxiv",
    "version": 1
  }
}