Pith Number

pith:ZRZD2R6R

pith:2018:ZRZD2R6RDLOX34RVTRIW4YNJT7

not attested not anchored not stored refs pending

The Pristine Survey IV: Approaching the Galactic metallicity floor with the discovery of an ultra metal-poor star

Alan W. McConnachie, Anke Arentsen, Carlos Allende Prieto, Carmela Lardo, Collin Kielty, David S. Aguado, Eline Tolstoy, Elisabetta Caffau, Else Starkenburg, Federico Sestito, Helmer H. Koppelman, Jonay I. Gonzalez Hernandez, Julio F. Navarro, Kim A. Venn, Kris Youakim, Marc Gentile, Morgan Fouesneau, Nicolas Longeard, Nicolas Martin, Pascale Jablonka, Patrick Cote, Piercarlo Bonifacio, Raymond G. Carlberg, Ruben Sanchez-Janssen, Vanessa Hill

arxiv:1807.04292 v1 · 2018-07-11 · 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{ZRZD2R6RDLOX34RVTRIW4YNJT7}

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	2026-05-18T00:07:06.202592Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc723d47d11add7df2359c516e61a99fcafbaa9f4f864b7bdded26c9088f8ed4

Aliases

arxiv: 1807.04292 · arxiv_version: 1807.04292v1 · doi: 10.48550/arxiv.1807.04292 · pith_short_12: ZRZD2R6RDLOX · pith_short_16: ZRZD2R6RDLOX34RV · pith_short_8: ZRZD2R6R

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/ZRZD2R6RDLOX34RVTRIW4YNJT7 \
  | 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: cc723d47d11add7df2359c516e61a99fcafbaa9f4f864b7bdded26c9088f8ed4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6c5b22ab2e3076b5eb0580d868e8276c2169e1a0047511565cda5d6d4f13d6fa",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-07-11T18:00:06Z",
    "title_canon_sha256": "d1f7707de5ce5c7a0534e29ba02b657d2c4d41928f7abfb21025ec29f5aa0b51"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.04292",
    "kind": "arxiv",
    "version": 1
  }
}