Pith Number

pith:FRS6FSMI

pith:2004:FRS6FSMIU7MWZCZCH2HRCHJCQC

not attested not anchored not stored refs pending

A multifrequency analysis of radio variability of blazars

A. Ciaramella, A. Lahteenmaki, C. Bongardo, G. de Zotti, G. Longo, H.D. Aller, H. Terasranta, L. Milano, M.F. Aller, M. Tornikoski, R. Tagliaferri, S. Urpo

arxiv:astro-ph/0401501 v2 · 2004-01-23 · 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{FRS6FSMIU7MWZCZCH2HRCHJCQC}

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	2026-07-04T16:42:54.528542Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c65e2c988a7d96c8b223e8f111d2280bc084d3bc6b7ec007f411b24d6aa84ee

Aliases

arxiv: astro-ph/0401501 · arxiv_version: astro-ph/0401501v2 · doi: 10.48550/arxiv.astro-ph/0401501 · pith_short_12: FRS6FSMIU7MW · pith_short_16: FRS6FSMIU7MWZCZC · pith_short_8: FRS6FSMI

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/FRS6FSMIU7MWZCZCH2HRCHJCQC \
  | 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: 2c65e2c988a7d96c8b223e8f111d2280bc084d3bc6b7ec007f411b24d6aa84ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c7ac6ca6207b863a7409152e80888bbec1dc4f48200e140a5feb5ee8c2c454d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-01-23T15:06:43Z",
    "title_canon_sha256": "bdff382e111181e9a84ae11b4a4195c8d207f9fac066f0bf1a1d39a6c5112190"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0401501",
    "kind": "arxiv",
    "version": 2
  }
}