Pith Number

pith:R5VDJNJJ

pith:2016:R5VDJNJJII6SQWVT2LUPXSGCZV

not attested not anchored not stored refs pending

Observational Constraints on First-Star Nucleosynthesis. II. Spectroscopy of an Ultra Metal-Poor CEMP-no Star

Alexander Heger, Andrew R. Casey, Anirudh Chiti, Anna Frebel, Conrad Chan, Jinmi Yoon, Norbert Christlieb, Timothy C. Beers, Vinicius M. Placco

arxiv:1609.02134 v1 · 2016-09-07 · 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{R5VDJNJJII6SQWVT2LUPXSGCZV}

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	2026-05-18T00:55:12.098411Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f6a34b529423d285ab3d2e8fbc8c2cd506615d213cdaf53a28cb57b8950cffc

Aliases

arxiv: 1609.02134 · arxiv_version: 1609.02134v1 · doi: 10.48550/arxiv.1609.02134 · pith_short_12: R5VDJNJJII6S · pith_short_16: R5VDJNJJII6SQWVT · pith_short_8: R5VDJNJJ

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/R5VDJNJJII6SQWVT2LUPXSGCZV \
  | 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: 8f6a34b529423d285ab3d2e8fbc8c2cd506615d213cdaf53a28cb57b8950cffc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8eaf440c33ecc54a155acc6a348b5c1a6f5031ec53ea8f3264a11cad0a15b877",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-09-07T19:56:11Z",
    "title_canon_sha256": "0bea27fd4f08c8022f4ba2f6b56f430e6665bf1c1b4b325241c42c8fc0648122"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.02134",
    "kind": "arxiv",
    "version": 1
  }
}