Pith Number

pith:D6HL7TNQ

pith:2004:D6HL7TNQK542WKKO56K3RPZH2I

not attested not anchored not stored refs pending

The 9C Survey: a deeper source count at 15 GHz

E. M. Waldram, G. G. Pooley

arxiv:astro-ph/0407422 v1 · 2004-07-20 · 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{D6HL7TNQK542WKKO56K3RPZH2I}

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	2026-07-04T14:13:40.362355Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f8ebfcdb05779ab294eef95b8bf27d205b3f348c1122e574515e72ea239981e

Aliases

arxiv: astro-ph/0407422 · arxiv_version: astro-ph/0407422v1 · doi: 10.48550/arxiv.astro-ph/0407422 · pith_short_12: D6HL7TNQK542 · pith_short_16: D6HL7TNQK542WKKO · pith_short_8: D6HL7TNQ

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/D6HL7TNQK542WKKO56K3RPZH2I \
  | 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: 1f8ebfcdb05779ab294eef95b8bf27d205b3f348c1122e574515e72ea239981e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d8e86a1c550b3767d23a91f11aab70239a66d5b84c046d582811aa8be65d4636",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-07-20T11:23:50Z",
    "title_canon_sha256": "c6c3dd3760b2b56f42413ad6839993158f9d3a2df35eab386b6f21b4208e1959"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0407422",
    "kind": "arxiv",
    "version": 1
  }
}