Pith Number

pith:VPUBBZE2

pith:2009:VPUBBZE2VLTTJG7YGQCAL472HE

not attested not anchored not stored refs pending

The NASA-UC Eta-Earth Program: I. A Super-Earth Orbiting HD 7924

Andrew W. Howard, Debra A. Fischer, Geoffrey W. Marcy, Gregory W. Henry, Howard Isaacson, Jason T. Wright, Jay Anderson, Jeff A. Valenti, John A. Johnson, Matthew J. Giguere, Nikolai E. Piskunov

arxiv:0901.4394 v1 · 2009-01-28 · 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{VPUBBZE2VLTTJG7YGQCAL472HE}

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	2026-05-18T04:29:17.047242Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

abe810e49aaae7349bf8340405f3fa393527171417ca6cc56e1e0411fe582d1b

Aliases

arxiv: 0901.4394 · arxiv_version: 0901.4394v1 · doi: 10.48550/arxiv.0901.4394 · pith_short_12: VPUBBZE2VLTT · pith_short_16: VPUBBZE2VLTTJG7Y · pith_short_8: VPUBBZE2

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/VPUBBZE2VLTTJG7YGQCAL472HE \
  | 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: abe810e49aaae7349bf8340405f3fa393527171417ca6cc56e1e0411fe582d1b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5c3fd458ab3c32214161ebf388dee2d6e65bbb94a3eb380052cae5649eded1df",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-01-28T03:36:01Z",
    "title_canon_sha256": "eda66d9b387de1691e56d142934834575501f1396b42f9dfed5fa8656ae364b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4394",
    "kind": "arxiv",
    "version": 1
  }
}