Pith Number

pith:TJVEKPGB

pith:2015:TJVEKPGBYDH6X35VM2LPDPN6SL

not attested not anchored not stored refs pending

The Secret Lives of Cepheids: A Multi-Wavelength Study of the Atmospheres and Real-Time Evolution of Classical Cepheids

Scott G. Engle

arxiv:1504.02713 v1 · 2015-04-10 · 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{TJVEKPGBYDH6X35VM2LPDPN6SL}

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	2026-05-18T01:20:11.893324Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9a6a453cc1c0cfebefb56696f1bdbe92f5dcb059b287171f07fc8050cdfcf596

Aliases

arxiv: 1504.02713 · arxiv_version: 1504.02713v1 · doi: 10.48550/arxiv.1504.02713 · pith_short_12: TJVEKPGBYDH6 · pith_short_16: TJVEKPGBYDH6X35V · pith_short_8: TJVEKPGB

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/TJVEKPGBYDH6X35VM2LPDPN6SL \
  | 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: 9a6a453cc1c0cfebefb56696f1bdbe92f5dcb059b287171f07fc8050cdfcf596

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a04b8e9c079a7af9d59c8f04b310b9bc6eedcd1191f53ae07aa8ddbc8df0b42b",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-04-10T15:31:29Z",
    "title_canon_sha256": "a023a8a1bc166ba3140163898f4576a7c193fae5b6f0fbb450aa1f915b8641d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.02713",
    "kind": "arxiv",
    "version": 1
  }
}