Pith Number

pith:I2R7KPWH

pith:2009:I2R7KPWH377KPPQIQPKILSDOTC

not attested not anchored not stored refs pending

Linking dwarf galaxies to halo building blocks with the most metal-poor star in Sculptor

(2) Caltech, (3) Carnegie Observatories), Anna Frebel (1), Evan Kirby (2), Joshua D. Simon (3) ((1) Harvard-Smithsonian CfA

arxiv:0912.4734 v1 · 2009-12-23 · astro-ph.GA · astro-ph.CO · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{I2R7KPWH377KPPQIQPKILSDOTC}

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	2026-05-18T02:10:13.995731Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

46a3f53ec7dffea7be0883d485c86e98a365e35007ebb2e8a3389540cc3f8bc0

Aliases

arxiv: 0912.4734 · arxiv_version: 0912.4734v1 · doi: 10.48550/arxiv.0912.4734 · pith_short_12: I2R7KPWH377K · pith_short_16: I2R7KPWH377KPPQI · pith_short_8: I2R7KPWH

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/I2R7KPWH377KPPQIQPKILSDOTC \
  | 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: 46a3f53ec7dffea7be0883d485c86e98a365e35007ebb2e8a3389540cc3f8bc0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7b1fa338abc76bec9d4b522486eb1b800f793ab09f2cb59c008e20ca31e025c5",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-12-23T21:01:25Z",
    "title_canon_sha256": "1ec7920d944b622b2cda1d0cea954f85a8727f545dde48d797083357ebb22439"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.4734",
    "kind": "arxiv",
    "version": 1
  }
}