Pith Number

pith:ZDFDHFWP

pith:2009:ZDFDHFWP5FKCX536NHVJPHSAQT

not attested not anchored not stored refs pending

Pre-Discovery 2007 Image of the HR 8799 Planetary System

B. Zuckerman (UCLA), Christian Marois (Herzberg Institute for Astrophysics), Stanimir Metchev (Stony Brook Univsersity)

arxiv:0910.0915 v1 · 2009-10-06 · 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{ZDFDHFWP5FKCX536NHVJPHSAQT}

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	2026-05-18T02:34:20.088385Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c8ca3396cfe9542bf77e69ea979e4084ddff2d706611668e276d3b1cb5d65b79

Aliases

arxiv: 0910.0915 · arxiv_version: 0910.0915v1 · doi: 10.48550/arxiv.0910.0915 · pith_short_12: ZDFDHFWP5FKC · pith_short_16: ZDFDHFWP5FKCX536 · pith_short_8: ZDFDHFWP

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/ZDFDHFWP5FKCX536NHVJPHSAQT \
  | 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: c8ca3396cfe9542bf77e69ea979e4084ddff2d706611668e276d3b1cb5d65b79

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "492021f04b599ee218086ef8de8b4e9c775ff268758a9d42c8907f9759053682",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-10-06T02:52:35Z",
    "title_canon_sha256": "f48df509a0e6b62c1c73e697bd0ef3dc8444d32744670338419a261269b5cb8e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.0915",
    "kind": "arxiv",
    "version": 1
  }
}