Pith Number

pith:PWCDGMKS

pith:2016:PWCDGMKSR4OXP2GUWQJC7KIR7H

not attested not anchored not stored refs pending

2MASS J18082002-5104378: The brightest (V=11.9) ultra metal-poor star

Gabriel Perez, Ivan Ramirez, Jorge Melendez, Marcelo Tucci-Maia, Ting S. Li, Vinicius M. Placco

arxiv:1601.03462 v1 · 2016-01-14 · 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{PWCDGMKSR4OXP2GUWQJC7KIR7H}

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	2026-05-18T01:22:53.432838Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d843331528f1d77e8d4b4122fa911f9e14485ef44e9fee52eea6c1565223417

Aliases

arxiv: 1601.03462 · arxiv_version: 1601.03462v1 · doi: 10.48550/arxiv.1601.03462 · pith_short_12: PWCDGMKSR4OX · pith_short_16: PWCDGMKSR4OXP2GU · pith_short_8: PWCDGMKS

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/PWCDGMKSR4OXP2GUWQJC7KIR7H \
  | 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: 7d843331528f1d77e8d4b4122fa911f9e14485ef44e9fee52eea6c1565223417

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "182e1dee6f378cf1524234a2d856034fa7159fad12f2ba0984bf81f0c91553f6",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-01-14T01:46:48Z",
    "title_canon_sha256": "625deac3994dcd07a2c48c0b9d4fdb4da8c9b87589bafd7379b006a3c8c26547"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.03462",
    "kind": "arxiv",
    "version": 1
  }
}