Pith Number

pith:ETKDNMQS

pith:2025:ETKDNMQSQCOAB7R46JDJV55YS2

not attested not anchored not stored refs pending

The SEDs of very long-period cepheids in the Milky Way, the Magellanic Clouds, M31 and M33

Martin Groenewegen

arxiv:2507.04757 v1 · 2025-07-07 · astro-ph.GA · 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{ETKDNMQSQCOAB7R46JDJV55YS2}

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	2026-07-05T11:32:53.536598Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

24d436b212809c00fe3cf2469af7b896be23ad9e22df9ebb10d31f4fe92e5a17

Aliases

arxiv: 2507.04757 · arxiv_version: 2507.04757v1 · doi: 10.48550/arxiv.2507.04757 · pith_short_12: ETKDNMQSQCOA · pith_short_16: ETKDNMQSQCOAB7R4 · pith_short_8: ETKDNMQS

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/ETKDNMQSQCOAB7R46JDJV55YS2 \
  | 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: 24d436b212809c00fe3cf2469af7b896be23ad9e22df9ebb10d31f4fe92e5a17

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c38ae59b3243a4a2735f008c52e3814a9466f77f3beaaaa151c14ed30516cc28",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-07-07T08:32:53Z",
    "title_canon_sha256": "13649ebf6df78770a2502bb82e444ed56d3e2ee53ee085027be14a48b0f99b73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.04757",
    "kind": "arxiv",
    "version": 1
  }
}