Pith Number

pith:HBU2BYXI

pith:2009:HBU2BYXIHZEASLUGBQFAXZN7R4

not attested not anchored not stored refs pending

The discovery of an M4+T8.5 binary system

A.A. West, A. Day-Jones, Ben Burningham, C.G.Tinney, D. Barrado y Navascues, D. Homeier, D.J.Pinfield, D.N.Murray, H.R.A. Jones, M.C.Galvez-Ortiz, M.C.Liu, M. Morales Calderon, M. Tamura, N.Huelamo, N. Lodieu, P. W. Lucas, S. Folkes, S.K.Leggett, T.J.Dupuy, Z.Zhang

arxiv:0902.1812 v1 · 2009-02-11 · 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{HBU2BYXIHZEASLUGBQFAXZN7R4}

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	2026-07-04T17:14:23.746290Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3869a0e2e83e48092e860c0a0be5bf8f340cf2261075fb88c5b7c4e765940ad8

Aliases

arxiv: 0902.1812 · arxiv_version: 0902.1812v1 · doi: 10.48550/arxiv.0902.1812 · pith_short_12: HBU2BYXIHZEA · pith_short_16: HBU2BYXIHZEASLUG · pith_short_8: HBU2BYXI

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/HBU2BYXIHZEASLUGBQFAXZN7R4 \
  | 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: 3869a0e2e83e48092e860c0a0be5bf8f340cf2261075fb88c5b7c4e765940ad8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ac1e5dfab6c6aa649b1f0638e7ffbede7cb60c9eb73459a1701f2eea86760775",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-02-11T06:46:51Z",
    "title_canon_sha256": "d216253f80303a78340d085f4f7d819a27a8eda6a7e9ce2ef87b9880eeb973d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.1812",
    "kind": "arxiv",
    "version": 1
  }
}