Pith Number

pith:R5A2CMKZ

pith:2025:R5A2CMKZ7QHNJCRE4QI2MBFJ3E

not attested not anchored not stored refs pending

A reference framework for extremely metal-poor OB star studies: calibrations for stellar parameters and intrinsic colours

Artemio Herrero, Francisco Najarro, Marta Lorenzo, Miguel Cervi\~no, Miriam Garcia, Norberto Castro, Sergio Sim\'on-D\'iaz

arxiv:2501.07569 v1 · 2025-01-13 · astro-ph.SR · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R5A2CMKZ7QHNJCRE4QI2MBFJ3E}

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	2026-07-05T10:00:30.244957Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f41a13159fc0ed48a24e411a604a9d92c5d0029be04bed24c9ceebfb5d66e70

Aliases

arxiv: 2501.07569 · arxiv_version: 2501.07569v1 · doi: 10.48550/arxiv.2501.07569 · pith_short_12: R5A2CMKZ7QHN · pith_short_16: R5A2CMKZ7QHNJCRE · pith_short_8: R5A2CMKZ

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/R5A2CMKZ7QHNJCRE4QI2MBFJ3E \
  | 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: 8f41a13159fc0ed48a24e411a604a9d92c5d0029be04bed24c9ceebfb5d66e70

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1f19b9b2d7dda0e8473859b66cb5c7772b550caac1723dc43da19d3db94b971",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2025-01-13T18:57:05Z",
    "title_canon_sha256": "b13c00e2aae0ea702169aea43dc3610eb0a94b28c3bdfa5f2df3571d1d75e3cc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.07569",
    "kind": "arxiv",
    "version": 1
  }
}