Pith Number

pith:WFTUEYIC

pith:2021:WFTUEYICSDINUOP5ZIDEYUYFYP

not attested not anchored not stored refs pending

Discovery of periodic variables in the hot subdwarf catalogue through a systematic search in Zwicky Transient Facility data

Brad N. Barlow, Kevin Wang, Thomas Kupfer

arxiv:2112.12868 v2 · 2021-12-23 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WFTUEYICSDINUOP5ZIDEYUYFYP}

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	2026-07-05T06:35:22.959526Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b16742610290d0da39fdca064c5305c3e02f9007e3867b64dd168d9ade1c0b47

Aliases

arxiv: 2112.12868 · arxiv_version: 2112.12868v2 · doi: 10.48550/arxiv.2112.12868 · pith_short_12: WFTUEYICSDIN · pith_short_16: WFTUEYICSDINUOP5 · pith_short_8: WFTUEYIC

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/WFTUEYICSDINUOP5ZIDEYUYFYP \
  | 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: b16742610290d0da39fdca064c5305c3e02f9007e3867b64dd168d9ade1c0b47

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "21a4a7796642edeed481e7c780872c47e1c17bd5602801099c0be91c858618cc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2021-12-23T22:28:12Z",
    "title_canon_sha256": "d6d3913e0bfdc52dfe9d846bbf94b1b9e6b31fa9aec05cb722280cae5f7be33c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.12868",
    "kind": "arxiv",
    "version": 2
  }
}