Pith Number

pith:WLUGFMCG

pith:2009:WLUGFMCGCFALEA3T44DURHZK5F

not attested not anchored not stored refs pending

The Secret XUV Lives of Cepheids: FUV/X-ray Observations of Polaris and beta Dor

Edward F. Guinan, Joseph DePasquale, Nancy Evans, Scott G. Engle

arxiv:0902.3449 v1 · 2009-02-19 · astro-ph.SR · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WLUGFMCGCFALEA3T44DURHZK5F}

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	2026-05-18T02:14:46.807202Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b2e862b0461140b20373e707489f2ae954690af02edf650a49c7c11f3eee9d09

Aliases

arxiv: 0902.3449 · arxiv_version: 0902.3449v1 · doi: 10.48550/arxiv.0902.3449 · pith_short_12: WLUGFMCGCFAL · pith_short_16: WLUGFMCGCFALEA3T · pith_short_8: WLUGFMCG

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/WLUGFMCGCFALEA3T44DURHZK5F \
  | 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: b2e862b0461140b20373e707489f2ae954690af02edf650a49c7c11f3eee9d09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5411aa5759bc6d2610f1429476a6ccdf7a520eb0ebb6f97c5a20da2e7cce50e8",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-02-19T20:11:41Z",
    "title_canon_sha256": "9bf5bf32d3307e6737d400e36d97339b6a96b152f8e7e6f9bf50065ecf054bb8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.3449",
    "kind": "arxiv",
    "version": 1
  }
}