Pith Number

pith:SPY5LHWK

pith:2004:SPY5LHWKEAAPIK6S3T5V5UOISH

not attested not anchored not stored refs pending

Radio Variability of Radio Quiet and Radio Loud Quasars

Heino Falke, Joseph Lehar, Katherine M. Blundell, Mark Birkinshaw, Richard Barvainis

arxiv:astro-ph/0409554 v1 · 2004-09-22 · 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{SPY5LHWKEAAPIK6S3T5V5UOISH}

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.

Cited by

2 papers in Pith

The emergence of X-ray emission lines during relativistic radio-jet formation in the changing-look active galactic nucleus 1ES 1927+654

Extreme outflow velocities and weak UV emission lines indicate quasars shedding their dust cocoons

Receipt and verification

First computed	2026-07-04T16:44:44.672449Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93f1d59eca2000f42bd2dcfb5ed1c891ea8b67ae2a7c8ee0b77ebf09b96d7395

Aliases

arxiv: astro-ph/0409554 · arxiv_version: astro-ph/0409554v1 · doi: 10.48550/arxiv.astro-ph/0409554 · pith_short_12: SPY5LHWKEAAP · pith_short_16: SPY5LHWKEAAPIK6S · pith_short_8: SPY5LHWK

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/SPY5LHWKEAAPIK6S3T5V5UOISH \
  | 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: 93f1d59eca2000f42bd2dcfb5ed1c891ea8b67ae2a7c8ee0b77ebf09b96d7395

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4a00b03b0818b553fc709bd0ee8b96a9783d7ad403722bc67877a3768b010758",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-09-22T22:15:06Z",
    "title_canon_sha256": "89046749d461aa2883a2b50477248a8114685bc057ad382245742134b14d7795"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0409554",
    "kind": "arxiv",
    "version": 1
  }
}