Pith Number

pith:66Y4D56M

pith:2009:66Y4D56MSTIWUIQFWVMKFETR74

not attested not anchored not stored refs pending

The Spectral Types of White Dwarfs in Messier 4

David R. Reitzel, D. Saul Davis, Harvey B. Richer, Jason S. Kalirai, R. Michael Rich

arxiv:0909.2254 v1 · 2009-09-11 · 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{66Y4D56MSTIWUIQFWVMKFETR74}

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	2026-05-18T02:34:30.324118Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f7b1c1f7cc94d16a2205b558a29271ff3bc502c6cf836c09d28e5c87dd40ed93

Aliases

arxiv: 0909.2254 · arxiv_version: 0909.2254v1 · doi: 10.48550/arxiv.0909.2254 · pith_short_12: 66Y4D56MSTIW · pith_short_16: 66Y4D56MSTIWUIQF · pith_short_8: 66Y4D56M

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/66Y4D56MSTIWUIQFWVMKFETR74 \
  | 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: f7b1c1f7cc94d16a2205b558a29271ff3bc502c6cf836c09d28e5c87dd40ed93

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c41b23ab9c75c441c0d7724da5849615f25c04918d1deeb37e0e6d6cd92238a9",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-09-11T20:00:21Z",
    "title_canon_sha256": "66eceb3d4933c7ae0f95c22c43b0009f787261d87ff1775de07ce643283b8d29"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2254",
    "kind": "arxiv",
    "version": 1
  }
}