Pith Number

pith:HFZAGQQJ

pith:2009:HFZAGQQJTM44QKUGYZXOD2HZ46

not attested not anchored not stored refs pending

The Cepheid Distance Scale: recent progress in fundamental techniques

Thomas G. Barnes III

arxiv:0908.3859 v1 · 2009-08-26 · 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{HFZAGQQJTM44QKUGYZXOD2HZ46}

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	2026-05-18T02:12:22.620771Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

39720342099b39c82a86c66ee1e8f9e79c89a8b8d24b7c5e4243a0551ca5d753

Aliases

arxiv: 0908.3859 · arxiv_version: 0908.3859v1 · doi: 10.48550/arxiv.0908.3859 · pith_short_12: HFZAGQQJTM44 · pith_short_16: HFZAGQQJTM44QKUG · pith_short_8: HFZAGQQJ

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/HFZAGQQJTM44QKUGYZXOD2HZ46 \
  | 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: 39720342099b39c82a86c66ee1e8f9e79c89a8b8d24b7c5e4243a0551ca5d753

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9a755a66dd915509fd8f867f30bfddcc4397f2d35598c62a5f1ebce8cad0795f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-08-26T16:27:52Z",
    "title_canon_sha256": "eb4c64f632bc025c378697ee0b821e786ba8d164c50a4ab7c1aeb695f05b8173"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3859",
    "kind": "arxiv",
    "version": 1
  }
}