Pith Number

pith:ULH6QF4O

pith:2011:ULH6QF4OVM3M7PIYJ6ZZ7GJZOT

not attested not anchored not stored refs pending

SDSS J163030.58+423305.8: A 40 minute Orbital Period Detached White Dwarf Binary

Carlos Allende Prieto, D. E. Winget, J. J. Hermes, K. I. Winget, Mukremin Kilic, S. J. Kenyon, Warren R. Brown

arxiv:1109.6339 v1 · 2011-09-28 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ULH6QF4OVM3M7PIYJ6ZZ7GJZOT}

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	2026-05-18T02:00:21.849523Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2cfe8178eab36cfbd184fb39f993974cbc0cf868376f71c9b732c67fbdca192

Aliases

arxiv: 1109.6339 · arxiv_version: 1109.6339v1 · doi: 10.48550/arxiv.1109.6339 · pith_short_12: ULH6QF4OVM3M · pith_short_16: ULH6QF4OVM3M7PIY · pith_short_8: ULH6QF4O

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/ULH6QF4OVM3M7PIYJ6ZZ7GJZOT \
  | 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: a2cfe8178eab36cfbd184fb39f993974cbc0cf868376f71c9b732c67fbdca192

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1760d0546e419102aa224e61d920240f1a53dd410e46dd07c76fa44a506b91ac",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-09-28T20:13:48Z",
    "title_canon_sha256": "d20a06b537e618be375c96fe491de6c104c3f64fa6794f510a574c70d3c09413"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.6339",
    "kind": "arxiv",
    "version": 1
  }
}