Pith Number

pith:PBPBVAQG

pith:2009:PBPBVAQGJ74QNP3RYQVFTSUDYS

not attested not anchored not stored refs pending

Imaging search for the unseen companion to Eps Ind A -- Improving the detection limits with 4 micron observations

D. Apai, D. Lafreniere, K. Geissler, M. Endl, M. Janson, M. Kasper, M. Kuerster, M. Zechmeister, S. Hippler, S. Reffert, Th. Henning, W. Brandner

arxiv:0906.4145 v1 · 2009-06-23 · 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{PBPBVAQGJ74QNP3RYQVFTSUDYS}

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	2026-05-18T02:13:13.272987Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

785e1a82064ff906bf71c42a59ca83c498f2a5ac905c81cba18b2848ef7e4bcf

Aliases

arxiv: 0906.4145 · arxiv_version: 0906.4145v1 · doi: 10.48550/arxiv.0906.4145 · pith_short_12: PBPBVAQGJ74Q · pith_short_16: PBPBVAQGJ74QNP3R · pith_short_8: PBPBVAQG

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/PBPBVAQGJ74QNP3RYQVFTSUDYS \
  | 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: 785e1a82064ff906bf71c42a59ca83c498f2a5ac905c81cba18b2848ef7e4bcf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "439960c551ec4bde82a6af79c44a43a1020fa8a1f7a9ea9ee68dbeb1ce38172c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-06-23T00:18:14Z",
    "title_canon_sha256": "369f26e0e96b9313698b3f814c599655c151946ff8b4f47503f043f18475be3f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.4145",
    "kind": "arxiv",
    "version": 1
  }
}