Pith Number

pith:DL4P3N6X

pith:2019:DL4P3N6XQRBHXKWRCVQOVV4RIC

not attested not anchored not stored refs pending

The SkyMapper DR1.1 Search for Extremely Metal-Poor Stars

A. D. Mackey, A. F. Marino, A. Frebel, A. R. Casey, B. P. Schmidt, D. Yong, G. S. Da Costa, J. E. Norris, K. Lind, M. Asplund, M. S. Bessell, S. J. Murphy, T. Nordlander

arxiv:1909.06227 v1 · 2019-09-13 · 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{DL4P3N6XQRBHXKWRCVQOVV4RIC}

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	2026-07-05T00:11:36.542434Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1af8fdb7d784427baad11560ead791408bc7784c523b8a556d3efe317e39ac20

Aliases

arxiv: 1909.06227 · arxiv_version: 1909.06227v1 · doi: 10.48550/arxiv.1909.06227 · pith_short_12: DL4P3N6XQRBH · pith_short_16: DL4P3N6XQRBHXKWR · pith_short_8: DL4P3N6X

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/DL4P3N6XQRBHXKWRCVQOVV4RIC \
  | 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: 1af8fdb7d784427baad11560ead791408bc7784c523b8a556d3efe317e39ac20

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ffdc484b41434511e2262fa39a38194a43e44c85c7852b1dd8294af4e546afec",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-09-13T13:37:42Z",
    "title_canon_sha256": "776526de848e5f1cabb6f15b35360c2176d3de66ead1b36df3167d0c9d8a60b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.06227",
    "kind": "arxiv",
    "version": 1
  }
}