Pith Number

pith:3VDLQPM4

pith:2017:3VDLQPM4PBFDXISFKOKUZKDPBJ

not attested not anchored not stored refs pending

Observational calibration of the projection factor of Cepheids IV. Period-projection factor relation of Galactic and Magellanic Cloud Cepheids

A. Gallenne, A. M\'erand, B. Trahin, G. Pietrzynski, N. Nardetto, P. Kervella, W. Gieren

arxiv:1708.09851 v2 · 2017-08-31 · 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{3VDLQPM4PBFDXISFKOKUZKDPBJ}

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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	2026-05-18T00:28:45.016429Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dd46b83d9c784a3ba24553954ca86f0a43772574714289b8f1589da75bc54f73

Aliases

arxiv: 1708.09851 · arxiv_version: 1708.09851v2 · doi: 10.48550/arxiv.1708.09851 · pith_short_12: 3VDLQPM4PBFD · pith_short_16: 3VDLQPM4PBFDXISF · pith_short_8: 3VDLQPM4

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/3VDLQPM4PBFDXISFKOKUZKDPBJ \
  | 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: dd46b83d9c784a3ba24553954ca86f0a43772574714289b8f1589da75bc54f73

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9b97ff8cc46a5b4b960a9f57d3997d3483a4e7753eb59f33d44b22d2612dba1b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-08-31T17:59:12Z",
    "title_canon_sha256": "45f3e3ae8fdd23afb808a1697a1af43ca114fde434d1898050bc2292268d515d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.09851",
    "kind": "arxiv",
    "version": 2
  }
}