Pith Number

pith:XZ4XWRW4

pith:2005:XZ4XWRW42HTYL6GWBFF5WVBTUI

not attested not anchored not stored refs pending

The new record holder for the most iron-poor star: HE 1327-2326, a dwarf or subgiant with [Fe/H]=-5.4

A. Frebel, C. Fechner, H. Ando, J.E. Norris, K. Eriksson, K. Nomoto, M. Asplund, M. Takada-Hidai, M.Y. Fujimoto, N. Christlieb, P.S. Barklem, S.G. Ryan, S. Honda, S. Tsangarides, T. C. Beers, T. Kajino, T. Minezaki, W. Aoki, Y. Yoshii

arxiv:astro-ph/0509658 v1 · 2005-09-22 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XZ4XWRW42HTYL6GWBFF5WVBTUI}

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	2026-05-18T01:07:30.500110Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be797b46dcd1e785f8d6094bdb5433a207aa80bf85fdd28de71eb4aff88425cf

Aliases

arxiv: astro-ph/0509658 · arxiv_version: astro-ph/0509658v1 · doi: 10.48550/arxiv.astro-ph/0509658 · pith_short_12: XZ4XWRW42HTY · pith_short_16: XZ4XWRW42HTYL6GW · pith_short_8: XZ4XWRW4

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/XZ4XWRW42HTYL6GWBFF5WVBTUI \
  | 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: be797b46dcd1e785f8d6094bdb5433a207aa80bf85fdd28de71eb4aff88425cf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0dee69db26603b759075dcb72aded2441ea21d368bf925907b7f1daf2db7091",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-09-22T06:30:27Z",
    "title_canon_sha256": "c31785639f9cc9948fc0c02d0a3aab2e75fd9d5bc63ea823d7507d5c0254e28d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0509658",
    "kind": "arxiv",
    "version": 1
  }
}