Pith Number

pith:DMQPZNUD

pith:2008:DMQPZNUDKYCQ7XGZBOP327KY66

not attested not anchored not stored refs pending

Uncovering Extremely Metal-Poor Stars in the Milky Way's Ultra-Faint Dwarf Spheroidal Satellite Galaxies

(2) California Institute of Technology, (3) Yale University, (4) University of Texas Austin/McDonald Observatory), Anna Frebel (4) ((1) University of California Santa Cruz/Lick Observatory, Evan N. Kirby (1), Joshua D. Simon (2), Marla Geha (3), Puragra Guhathakurta (1)

arxiv:0807.1925 v4 · 2008-07-14 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DMQPZNUDKYCQ7XGZBOP327KY66}

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	2026-05-18T04:38:17.526998Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b20fcb68356050fdcd90b9fbd7d58f7aa002d2065f651dca70f4460075f3f5a

Aliases

arxiv: 0807.1925 · arxiv_version: 0807.1925v4 · doi: 10.48550/arxiv.0807.1925 · pith_short_12: DMQPZNUDKYCQ · pith_short_16: DMQPZNUDKYCQ7XGZ · pith_short_8: DMQPZNUD

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/DMQPZNUDKYCQ7XGZBOP327KY66 \
  | 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: 1b20fcb68356050fdcd90b9fbd7d58f7aa002d2065f651dca70f4460075f3f5a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78e77b86a1f721473d4e18220ae83e8877c8a62ba36f879698d4bd24b0addbbd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-07-14T19:40:25Z",
    "title_canon_sha256": "556f455c90cf8a85f6155a0e8922b6c79095e0bfcbcb6463745f24308b5c6194"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.1925",
    "kind": "arxiv",
    "version": 4
  }
}