Pith Number

pith:2M4GKFY2

pith:2009:2M4GKFY2VCZUBO2TZQSCILVOD2

not attested not anchored not stored refs pending

51 Ophiuchus: A Possible Beta Pictoris Analog Measured with the Keck Interferometer Nuller

Bertrand Mennesson, Chris Koresko, Christopher C. Stark, Eugene Serabyn, John D. Monnier, Luke D. Keller, Marc J. Kuchner, Mark Colavita, Wesley A. Traub

arxiv:0909.1821 v1 · 2009-09-09 · 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{2M4GKFY2VCZUBO2TZQSCILVOD2}

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	2026-05-18T02:34:30.594703Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d33865171aa8b340bb53cc24242eae1e96699296cdf0fca5335288d5d0cc3e4d

Aliases

arxiv: 0909.1821 · arxiv_version: 0909.1821v1 · doi: 10.48550/arxiv.0909.1821 · pith_short_12: 2M4GKFY2VCZU · pith_short_16: 2M4GKFY2VCZUBO2T · pith_short_8: 2M4GKFY2

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/2M4GKFY2VCZUBO2TZQSCILVOD2 \
  | 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: d33865171aa8b340bb53cc24242eae1e96699296cdf0fca5335288d5d0cc3e4d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "be7c352520e6ef134565298988436a2860374a112a80b69ad20b611d87c27e8e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-09-09T20:44:59Z",
    "title_canon_sha256": "9a79174bd7205dde93950be7b6407bca96c859a997e52e9f8c7777796b3dc443"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1821",
    "kind": "arxiv",
    "version": 1
  }
}