Pith Number

pith:II4UGCXX

pith:2009:II4UGCXX5O3TQPBYY6EP3SFKWE

not attested not anchored not stored refs pending

Intranight polarization variability in radio-loud and radio-quiet AGN

C. Villforth, J. Heidt, J. Pforr, K. Nilsson, R. Ostensen, S.-M. Niemi

arxiv:0904.1598 v1 · 2009-04-09 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{II4UGCXX5O3TQPBYY6EP3SFKWE}

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	2026-05-18T02:14:06.656629Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4239430af7ebb7383c38c788fdc8aab103faa1b8ea86992060b122c3488c7360

Aliases

arxiv: 0904.1598 · arxiv_version: 0904.1598v1 · doi: 10.48550/arxiv.0904.1598 · pith_short_12: II4UGCXX5O3T · pith_short_16: II4UGCXX5O3TQPBY · pith_short_8: II4UGCXX

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/II4UGCXX5O3TQPBYY6EP3SFKWE \
  | 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: 4239430af7ebb7383c38c788fdc8aab103faa1b8ea86992060b122c3488c7360

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff69b0695693edc43df574a117ca6f9ebdf7da8cc6e6d6c62d4a715a3a8e2e5f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-09T20:07:13Z",
    "title_canon_sha256": "a8ff64f17a799774f4943059400b91343cefb29fb1d83d9a22a3cdabf2f0a97b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.1598",
    "kind": "arxiv",
    "version": 1
  }
}