Pith Number

pith:4W3B4R3O

pith:2017:4W3B4R3OA2RGNPBH4PVRXKQYFA

not attested not anchored not stored refs pending

The Secret Lives of Cepheids: $\delta$ Cep -- the Prototype of a New Class of Pulsating X-ray Variable Stars

Dr. Diaa E. Fawzy, Dr. Graham M. Harper, Dr. Hilding Neilson, Dr. Nancy R. Evans, Edward F. Guinan, Prof. Manfred Cuntz, Scott G. Engle

arxiv:1702.06560 v1 · 2017-02-21 · 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{4W3B4R3OA2RGNPBH4PVRXKQYFA}

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	2026-05-18T00:48:00.649100Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5b61e476e06a266bc27e3eb1baa182830441e702d18e4e9e9d8a82d16c17970

Aliases

arxiv: 1702.06560 · arxiv_version: 1702.06560v1 · doi: 10.48550/arxiv.1702.06560 · pith_short_12: 4W3B4R3OA2RG · pith_short_16: 4W3B4R3OA2RGNPBH · pith_short_8: 4W3B4R3O

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/4W3B4R3OA2RGNPBH4PVRXKQYFA \
  | 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: e5b61e476e06a266bc27e3eb1baa182830441e702d18e4e9e9d8a82d16c17970

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3cf51598e89f5ea5e3c1b26968ace24d99fe5f57affde62e5ebb501ca8075f41",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-02-21T19:44:20Z",
    "title_canon_sha256": "af23234fc5f2082903db2cf4a1a229e0e0f8dc9ed2f91db0c411633624f7c948"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.06560",
    "kind": "arxiv",
    "version": 1
  }
}