Pith Number

pith:XL7T7PWI

pith:2013:XL7T7PWIVMHDQA72VX2645S7VD

not attested not anchored not stored refs pending

Discovery of a Binary Brown Dwarf at 2 Parsecs from the Sun

K. L. Luhman

arxiv:1303.2401 v2 · 2013-03-11 · astro-ph.GA · 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{XL7T7PWIVMHDQA72VX2645S7VD}

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	2026-05-18T01:51:09.037181Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

baff3fbec8ab0e3803faadf5ee765fa8f3f36847f5f6ae1bbaae06074503f9e9

Aliases

arxiv: 1303.2401 · arxiv_version: 1303.2401v2 · doi: 10.48550/arxiv.1303.2401 · pith_short_12: XL7T7PWIVMHD · pith_short_16: XL7T7PWIVMHDQA72 · pith_short_8: XL7T7PWI

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/XL7T7PWIVMHDQA72VX2645S7VD \
  | 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: baff3fbec8ab0e3803faadf5ee765fa8f3f36847f5f6ae1bbaae06074503f9e9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0bad8832c1837c647a019d29e027c142f9b2aa1f66773b25bd65052d2698f0e1",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-03-11T00:35:01Z",
    "title_canon_sha256": "bbad18e9600faa0d705e59da291e3b92ef5b7605c727fe3e2f27ec47fae13c19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.2401",
    "kind": "arxiv",
    "version": 2
  }
}