Pith Number

pith:3QPPDHXQ

pith:2018:3QPPDHXQZN5HWVM5JRL3IYKCCI

not attested not anchored not stored refs pending

A Cavity of Large Grains in the Disk Around the Group II Herbig Ae/Be Star HD 142666

Adam E. Rubinstein, Catherine C. Espaillat, Connor Robinson, Enrique Macias, Ke Zhang, Nuria Calvet

arxiv:1804.07343 v1 · 2018-04-19 · astro-ph.SR · 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{3QPPDHXQZN5HWVM5JRL3IYKCCI}

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	2026-05-18T00:13:26.113461Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dc1ef19ef0cb7a7b559d4c57b46142122198c6768cb0a21a89c8848f4d62573b

Aliases

arxiv: 1804.07343 · arxiv_version: 1804.07343v1 · doi: 10.48550/arxiv.1804.07343 · pith_short_12: 3QPPDHXQZN5H · pith_short_16: 3QPPDHXQZN5HWVM5 · pith_short_8: 3QPPDHXQ

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/3QPPDHXQZN5HWVM5JRL3IYKCCI \
  | 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: dc1ef19ef0cb7a7b559d4c57b46142122198c6768cb0a21a89c8848f4d62573b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2cf0e52f13c20c7813cfda735c1f4b2ba9513b4500f938f1728f99d1f6f69f54",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-04-19T19:21:22Z",
    "title_canon_sha256": "7ec6d3d5fe86a501082ca5951f575fda4b28efb159c47d67a1598bf8bbc6a3c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.07343",
    "kind": "arxiv",
    "version": 1
  }
}