Pith Number

pith:SO54XIJ7

pith:2025:SO54XIJ73XEJMEZ32HFY4EOICR

not attested not anchored not stored refs pending

An on-sky investigation into factors limiting the performance of Keck-NIRC2 for conducting infrared high-contrast imaging

Jayke S. Nguyen, Ma\"issa Salama, Philip Hinz, Rachel Bowens-Rubin, William Thompson

arxiv:2509.07138 v1 · 2025-09-08 · 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{SO54XIJ73XEJMEZ32HFY4EOICR}

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	2026-07-05T12:07:16.238889Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93bbcba13fddc896133bd1cb8e11c8144fb71dbd7a1a90b2e4181e6521e10f6d

Aliases

arxiv: 2509.07138 · arxiv_version: 2509.07138v1 · doi: 10.48550/arxiv.2509.07138 · pith_short_12: SO54XIJ73XEJ · pith_short_16: SO54XIJ73XEJMEZ3 · pith_short_8: SO54XIJ7

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/SO54XIJ73XEJMEZ32HFY4EOICR \
  | 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: 93bbcba13fddc896133bd1cb8e11c8144fb71dbd7a1a90b2e4181e6521e10f6d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "06eb9ff0c3031e43ca9d1775f06d7d9b477fd21d6284a02dbd8558d15bbd1131",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2025-09-08T18:41:46Z",
    "title_canon_sha256": "98a4061f3f04324a561a50b3f7bad23b23971687375d6f1b6b08421bd3c4fd64"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.07138",
    "kind": "arxiv",
    "version": 1
  }
}