Pith Number

pith:CBDO22W7

pith:2009:CBDO22W7QGFWAM5Q3VSSGC34VC

not attested not anchored not stored refs pending

Spitzer Observations of the Oldest White Dwarfs in the Solar Neighborhood

Mukremin Kilic, Piotr M. Kowalski, Ted von Hippel, William T. Reach

arxiv:0902.4004 v1 · 2009-02-23 · 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{CBDO22W7QGFWAM5Q3VSSGC34VC}

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	2026-05-18T04:29:16.304620Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1046ed6adf818b6033b0dd65230b7ca8a05df1802cefefc4bdb98a0334a94b73

Aliases

arxiv: 0902.4004 · arxiv_version: 0902.4004v1 · doi: 10.48550/arxiv.0902.4004 · pith_short_12: CBDO22W7QGFW · pith_short_16: CBDO22W7QGFWAM5Q · pith_short_8: CBDO22W7

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/CBDO22W7QGFWAM5Q3VSSGC34VC \
  | 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: 1046ed6adf818b6033b0dd65230b7ca8a05df1802cefefc4bdb98a0334a94b73

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ed328846f5231b62e05b63ee628624743df98c82f318b11ffc4b0a636db1bf78",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-02-23T21:08:23Z",
    "title_canon_sha256": "ff38a2c1a157fa1c4aabc1bc2af47087ceb191961fe7aeb682cbeeab82edc023"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.4004",
    "kind": "arxiv",
    "version": 1
  }
}