Pith Number

pith:WMLJ5S32

pith:2012:WMLJ5S32QVQ2IYY4IZMYQDZDGV

not attested not anchored not stored refs pending

A simplified view of blazars: why BL Lacertae is actually a quasar in disguise

G. Polenta (ASDC, INAF), P. Giommi (ASDC), P. Padovani (ESO), S. Piranomonte (INAF), S. Turriziani (ASDC), V. D'Elia (ASDC

arxiv:1205.0647 v1 · 2012-05-03 · astro-ph.HE · 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{WMLJ5S32QVQ2IYY4IZMYQDZDGV}

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	2026-05-18T03:56:25.327650Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b3169ecb7a8561a4631c4659880f233543b6b49ebda7d87f36f08db3abebb53c

Aliases

arxiv: 1205.0647 · arxiv_version: 1205.0647v1 · doi: 10.48550/arxiv.1205.0647 · pith_short_12: WMLJ5S32QVQ2 · pith_short_16: WMLJ5S32QVQ2IYY4 · pith_short_8: WMLJ5S32

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/WMLJ5S32QVQ2IYY4IZMYQDZDGV \
  | 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: b3169ecb7a8561a4631c4659880f233543b6b49ebda7d87f36f08db3abebb53c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "54960e48e137f059941e94ef2e9882785d95902509c9856a4bee0da80a8e10ca",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-05-03T08:32:42Z",
    "title_canon_sha256": "58a049273d8d7ae030134c2e43f98ab1dcb5e2fc281b2ead552f3728fb083473"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.0647",
    "kind": "arxiv",
    "version": 1
  }
}