Pith Number

pith:KEL3L4I7

pith:2011:KEL3L4I7IDJX5FXSGWDLXB3H3R

not attested not anchored not stored refs pending

The Ultra Cool Brown Dwarf Companion of WD 0806-661: Age, Mass, and Formation Mechanism

Ben Zuckerman, Carl Melis, David R. Rodriguez, Inseok Song

arxiv:1103.3544 v2 · 2011-03-18 · astro-ph.SR · astro-ph.EP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KEL3L4I7IDJX5FXSGWDLXB3H3R}

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	2026-05-18T02:02:50.099766Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5117b5f11f40d37e96f23586bb8767dc5fb83f12028d07fe15a45b5e1166c7c3

Aliases

arxiv: 1103.3544 · arxiv_version: 1103.3544v2 · doi: 10.48550/arxiv.1103.3544 · pith_short_12: KEL3L4I7IDJX · pith_short_16: KEL3L4I7IDJX5FXS · pith_short_8: KEL3L4I7

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/KEL3L4I7IDJX5FXSGWDLXB3H3R \
  | 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: 5117b5f11f40d37e96f23586bb8767dc5fb83f12028d07fe15a45b5e1166c7c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67b1f93179ecc139bda5b3d559a8ace25c4ce6fef03d11f0bba90d254231a869",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-03-18T01:48:11Z",
    "title_canon_sha256": "e9b335cb165325515d7e0b69299414c2dc4f6fe0b7130cfe8e5cecc5aa42d0a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.3544",
    "kind": "arxiv",
    "version": 2
  }
}