Pith Number

pith:FSOTBLBM

pith:2009:FSOTBLBMVQJS2UDW4ITC2HAA6A

not attested not anchored not stored refs pending

Two Exoplanets Discovered at Keck Observatory

A. W. Howard, D. A. Fischer, G. W. Henry, G. W. Marcy, H. Isaacson, J. A. Johnson, J. A. Valenti, J. T. Wright, M. Giguere

arxiv:0908.1612 v1 · 2009-08-12 · astro-ph.EP · 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{FSOTBLBMVQJS2UDW4ITC2HAA6A}

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	2026-05-18T02:12:35.296129Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c9d30ac2cac132d5076e2262d1c00f0009f7151a712b243787dc474dd5b6478

Aliases

arxiv: 0908.1612 · arxiv_version: 0908.1612v1 · doi: 10.48550/arxiv.0908.1612 · pith_short_12: FSOTBLBMVQJS · pith_short_16: FSOTBLBMVQJS2UDW · pith_short_8: FSOTBLBM

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/FSOTBLBMVQJS2UDW4ITC2HAA6A \
  | 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: 2c9d30ac2cac132d5076e2262d1c00f0009f7151a712b243787dc474dd5b6478

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9aa7af45c4eee9e7b5259a143c6d477443f657d9a9295559ad9f72706c34942d",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-08-12T04:32:34Z",
    "title_canon_sha256": "aa59a7a65a8683ea06233fda6e8fe240430411d73a7932ed8666175d539cc0b2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.1612",
    "kind": "arxiv",
    "version": 1
  }
}