Pith Number

pith:FFNBLCUC

pith:2021:FFNBLCUCSMMDMCQEQ5MGQQB3WQ

not attested not anchored not stored refs pending

Cepheids with giant companions. I. Revealing a numerous population of double-lined binary Cepheids

Bogumi{\l} Pilecki, Grzegorz Pietrzy\'nski, Jesper Storm, M\'onica Taormina, Nancy R. Evans, Richard I. Anderson, Weronika Narloch, Wolfgang Gieren

arxiv:2102.11302 v1 · 2021-02-22 · 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{FFNBLCUCSMMDMCQEQ5MGQQB3WQ}

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	2026-07-05T02:31:53.457729Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

295a158a829318360a04875868403bb41ee8e7a2bcf843956fefd786a1decca5

Aliases

arxiv: 2102.11302 · arxiv_version: 2102.11302v1 · doi: 10.48550/arxiv.2102.11302 · pith_short_12: FFNBLCUCSMMD · pith_short_16: FFNBLCUCSMMDMCQE · pith_short_8: FFNBLCUC

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/FFNBLCUCSMMDMCQEQ5MGQQB3WQ \
  | 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: 295a158a829318360a04875868403bb41ee8e7a2bcf843956fefd786a1decca5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7c0b659dbf14ab8b34b0599d03ac0c8558392e315d33b2151dab2c91732ae94e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2021-02-22T19:00:38Z",
    "title_canon_sha256": "e2a26eae627cdfb9846cbfff6a2492e239b0d1672432a32c23447b72b8162e8a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.11302",
    "kind": "arxiv",
    "version": 1
  }
}