Pith Number

pith:4EPZEVB3

pith:2025:4EPZEVB3QL7NUU5LTEAX6CJYFW

not attested not anchored not stored refs pending

Demonstrating Improved Contrast on the Roman Coronagraph with Spatial Linear Dark Field Control

Dan Sirbu, Mona El Morsy, Olivier Guyon, Ruslan Belikov, Thayne Currie

arxiv:2509.08905 v1 · 2025-09-10 · 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{4EPZEVB3QL7NUU5LTEAX6CJYFW}

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	2026-07-05T12:08:39.073696Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e11f92543b82feda53ab99017f09382d9e62b876677e0f151dc0630d95f39e02

Aliases

arxiv: 2509.08905 · arxiv_version: 2509.08905v1 · doi: 10.48550/arxiv.2509.08905 · pith_short_12: 4EPZEVB3QL7N · pith_short_16: 4EPZEVB3QL7NUU5L · pith_short_8: 4EPZEVB3

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/4EPZEVB3QL7NUU5LTEAX6CJYFW \
  | 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: e11f92543b82feda53ab99017f09382d9e62b876677e0f151dc0630d95f39e02

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "442b854d0844ac2501b79e1b440773e15f9acb68ccc696508aff263480feea6a",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2025-09-10T18:06:50Z",
    "title_canon_sha256": "02391dd7452e58087e58b0ccdeb84884e607ee4d26caf3d152f4a490046289db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.08905",
    "kind": "arxiv",
    "version": 1
  }
}