Pith Number

pith:VIZNSIZW

pith:2012:VIZNSIZWBOAX4RGAHP3CK3DQZB

not attested not anchored not stored refs pending

X-Ray, UV and Optical Observations of Classical Cepheids: New Insights into Cepheid Evolution, and the Heating and Dynamics of Their Atmospheres

Edward F. Guinan, Scott G. Engle

arxiv:1206.4282 v1 · 2012-06-19 · 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{VIZNSIZWBOAX4RGAHP3CK3DQZB}

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	2026-05-18T03:53:07.500558Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aa32d923360b817e44c03bf6256c70c84c8f31cbef37465daa40c64e5656b687

Aliases

arxiv: 1206.4282 · arxiv_version: 1206.4282v1 · doi: 10.48550/arxiv.1206.4282 · pith_short_12: VIZNSIZWBOAX · pith_short_16: VIZNSIZWBOAX4RGA · pith_short_8: VIZNSIZW

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/VIZNSIZWBOAX4RGAHP3CK3DQZB \
  | 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: aa32d923360b817e44c03bf6256c70c84c8f31cbef37465daa40c64e5656b687

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c48136e173be4962bd4c4c5fc332916cffa022c38109af77c1938c465e0f576",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-06-19T18:03:12Z",
    "title_canon_sha256": "542b738e5f6a655b629c316449b5bc28980f737e60bc8a765c4743752fb40ae6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1206.4282",
    "kind": "arxiv",
    "version": 1
  }
}