Pith Number

pith:D7Q7VUZA

pith:2008:D7Q7VUZAFZNE7JM7WGJKERRFZN

not attested not anchored not stored refs pending

Radio Observations of the Hubble Deep Field South Region IV: Optical Properties of the Faint Radio Population

A. Fernandez-Soto, C.A. Jackson, M.T. Huynh, R.P. Norris

arxiv:0803.4394 v1 · 2008-03-31 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{D7Q7VUZAFZNE7JM7WGJKERRFZN}

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	2026-05-18T03:46:49.584745Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1fe1fad3202e5a4fa59fb192a24625cb6fc4e4c91d37782f5fb71eb0715c470b

Aliases

arxiv: 0803.4394 · arxiv_version: 0803.4394v1 · doi: 10.48550/arxiv.0803.4394 · pith_short_12: D7Q7VUZAFZNE · pith_short_16: D7Q7VUZAFZNE7JM7 · pith_short_8: D7Q7VUZA

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/D7Q7VUZAFZNE7JM7WGJKERRFZN \
  | 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: 1fe1fad3202e5a4fa59fb192a24625cb6fc4e4c91d37782f5fb71eb0715c470b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "024a45f854e5c906902449e12d088893374ee0a44ffca5ec28ba976c5b316087",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-03-31T08:32:25Z",
    "title_canon_sha256": "7a117e02227e548b7c4cc0201d501e9ff58942f3531688910fa7828be58d1add"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0803.4394",
    "kind": "arxiv",
    "version": 1
  }
}