Pith Number

pith:KM7GQ7K2

pith:2006:KM7GQ7K2FBZGMCXN7U3OJ5HPRL

not attested not anchored not stored refs pending

Spitzer Reveals Hidden Quasar Nuclei in Some Powerful FR II Radio Galaxies

(2) UC Santa Barbara, 3), (3) NRAO), Caltech, D. Whysong (2, P. M. Ogle (1), R. Antonucci (2) ((1) Spitzer Science Center

arxiv:astro-ph/0601485 v1 · 2006-01-20 · 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{KM7GQ7K2FBZGMCXN7U3OJ5HPRL}

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	2026-07-04T15:19:39.100037Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

533e687d5a2872660aedfd36e4f4ef8ac81086ca08ec186ef451e7950142e56f

Aliases

arxiv: astro-ph/0601485 · arxiv_version: astro-ph/0601485v1 · doi: 10.48550/arxiv.astro-ph/0601485 · pith_short_12: KM7GQ7K2FBZG · pith_short_16: KM7GQ7K2FBZGMCXN · pith_short_8: KM7GQ7K2

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/KM7GQ7K2FBZGMCXN7U3OJ5HPRL \
  | 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: 533e687d5a2872660aedfd36e4f4ef8ac81086ca08ec186ef451e7950142e56f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6878d51129645999b34eb91871b1620912af310dec7d45167bb5f5af16600ce8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-01-20T19:26:54Z",
    "title_canon_sha256": "aaba4091a2bb2338b7346a2ae006a62ce8c4751fbfc9a771fb143146789f5eb1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0601485",
    "kind": "arxiv",
    "version": 1
  }
}