Pith Number

pith:3ZWHWCRG

pith:2006:3ZWHWCRGOO7U26LEYYY6KVC3VO

not attested not anchored not stored refs pending

Discovery of a z=6.1 Radio-Loud Quasar in the NDWFS

David J. Helfand, Ian D. McGreer, Richard L. White, Robert H. Becker

arxiv:astro-ph/0607278 v2 · 2006-07-12 · 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{3ZWHWCRGOO7U26LEYYY6KVC3VO}

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	2026-05-18T04:28:58.424131Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

de6c7b0a2673bf4d7964c631e5545bab987b53fcb634d3099f5de2386c98d5e9

Aliases

arxiv: astro-ph/0607278 · arxiv_version: astro-ph/0607278v2 · doi: 10.48550/arxiv.astro-ph/0607278 · pith_short_12: 3ZWHWCRGOO7U · pith_short_16: 3ZWHWCRGOO7U26LE · pith_short_8: 3ZWHWCRG

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/3ZWHWCRGOO7U26LEYYY6KVC3VO \
  | 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: de6c7b0a2673bf4d7964c631e5545bab987b53fcb634d3099f5de2386c98d5e9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d1d02038f8d05389bff703f680b869f8655a2383ba1ebbefbb4190291f9fe24d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-07-12T21:25:05Z",
    "title_canon_sha256": "3ff7656e9747157c778b447cee64ed4335e06f6e940bab2852a0d8a638d69cc2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0607278",
    "kind": "arxiv",
    "version": 2
  }
}