Pith Number

pith:NTGIUMRX

pith:2020:NTGIUMRXCXUKSYMMGL4IHGFUVQ

not attested not anchored not stored refs pending

The R-Process Alliance: Chemo-Dynamically Tagged Groups of Halo $r$-Process-Enhanced Stars Reveal a Shared Chemical-Evolution History

Anna Frebel, Charli M. Sakari, Derek Shank, Dmitrii Gudin, Erika M. Holmbeck, Guilherme Limberg, Ian U. Roederer, Kaitlin C. Rasmussen, Rana Ezzeddine, Sarah Dietz, Terese T. Hansen, Timothy C. Beers, Vinicius Placco, Zhen Yuan

arxiv:2012.13808 v2 · 2020-12-26 · 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{NTGIUMRXCXUKSYMMGL4IHGFUVQ}

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	2026-07-05T02:17:46.722159Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ccc8a323715e8a9618c32f88398b4ac101b5bc4023baa43ffeee2f8d599b936

Aliases

arxiv: 2012.13808 · arxiv_version: 2012.13808v2 · doi: 10.48550/arxiv.2012.13808 · pith_short_12: NTGIUMRXCXUK · pith_short_16: NTGIUMRXCXUKSYMM · pith_short_8: NTGIUMRX

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/NTGIUMRXCXUKSYMMGL4IHGFUVQ \
  | 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: 6ccc8a323715e8a9618c32f88398b4ac101b5bc4023baa43ffeee2f8d599b936

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7b9829b78f244c158a9e166049c302ca38201780979714d7d5a04fd1e1f2af73",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-12-26T20:57:16Z",
    "title_canon_sha256": "b13fb5963d0c8ea47e1c894e57f1fb310c0b44875d2f55af52262d50fd819f19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2012.13808",
    "kind": "arxiv",
    "version": 2
  }
}