Pith Number

pith:Q2BLVOGS

pith:2002:Q2BLVOGSCIG6MSR7YACE7N6OYB

not attested not anchored not stored refs pending

Parameter Correlations and Cosmological Properties of BL Lac Objects

E. Perlman, H. Landt, M. Perri, P.Giommi, P. Padovani

arxiv:astro-ph/0209621 v2 · 2002-09-30 · 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{Q2BLVOGSCIG6MSR7YACE7N6OYB}

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	2026-07-04T14:12:15.954389Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8682bab8d2120de64a3fc0044fb7cec050f113d4c4d189ae64a8e4f7306a07a6

Aliases

arxiv: astro-ph/0209621 · arxiv_version: astro-ph/0209621v2 · doi: 10.48550/arxiv.astro-ph/0209621 · pith_short_12: Q2BLVOGSCIG6 · pith_short_16: Q2BLVOGSCIG6MSR7 · pith_short_8: Q2BLVOGS

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/Q2BLVOGSCIG6MSR7YACE7N6OYB \
  | 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: 8682bab8d2120de64a3fc0044fb7cec050f113d4c4d189ae64a8e4f7306a07a6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0671c3e3d87c8964047779c984ea8e48c9870b884be1e04c3990af4dac059642",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-09-30T15:19:57Z",
    "title_canon_sha256": "b6898582868589bf2aefd7a00daa712d1219811dc39232cc79b4a0b2afe38048"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0209621",
    "kind": "arxiv",
    "version": 2
  }
}