Pith Number

pith:BQX3633H

pith:2021:BQX3633HELQD4SOAJIJDFT3W5K

not attested not anchored not stored refs pending

The Ultramassive White Dwarfs of the Alpha Persei Cluster

David R. Miller, Harvey Richer, Ilaria Caiazzo, Jeremy Heyl

arxiv:2110.09668 v2 · 2021-10-19 · 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{BQX3633HELQD4SOAJIJDFT3W5K}

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	2026-07-05T04:10:37.827894Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0c2fbf6f6722e03e49c04a1232cf76eab595a42838b221d32005df4dbb81d960

Aliases

arxiv: 2110.09668 · arxiv_version: 2110.09668v2 · doi: 10.48550/arxiv.2110.09668 · pith_short_12: BQX3633HELQD · pith_short_16: BQX3633HELQD4SOA · pith_short_8: BQX3633H

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/BQX3633HELQD4SOAJIJDFT3W5K \
  | 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: 0c2fbf6f6722e03e49c04a1232cf76eab595a42838b221d32005df4dbb81d960

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1145aa5f300cb93e96dae09c201817840ce3ffe1b6ba2b3f45f3cea18e093364",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2021-10-19T00:23:26Z",
    "title_canon_sha256": "b9ce3d66a7b1814b32df3547ab550f3d266f964c28c178f77656d9bfee47648e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.09668",
    "kind": "arxiv",
    "version": 2
  }
}