Pith Number

pith:NCMJQXLH

pith:2017:NCMJQXLHEZMGCCRGCZ7WXCGE73

not attested not anchored not stored refs pending

The period-luminosity and period-radius relations of Type II and anomalous Cepheids

Martin A.T. Groenewegen, Monika Jurkovic

arxiv:1705.04487 v1 · 2017-05-12 · 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{NCMJQXLHEZMGCCRGCZ7WXCGE73}

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	2026-05-18T00:38:52.755193Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6898985d672658610a26167f6b88c4feded307fa288bda404c042e37f850286e

Aliases

arxiv: 1705.04487 · arxiv_version: 1705.04487v1 · doi: 10.48550/arxiv.1705.04487 · pith_short_12: NCMJQXLHEZMG · pith_short_16: NCMJQXLHEZMGCCRG · pith_short_8: NCMJQXLH

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/NCMJQXLHEZMGCCRGCZ7WXCGE73 \
  | 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: 6898985d672658610a26167f6b88c4feded307fa288bda404c042e37f850286e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "851c8030f7a682b2f7e65708aa089048f38be8a12117334d3650fe328d1c21cb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-05-12T09:48:07Z",
    "title_canon_sha256": "3126bbee2db19b16fdcb6e76b8a845cd9db92e4efe5b653688031ee735dd1219"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.04487",
    "kind": "arxiv",
    "version": 1
  }
}