Pith Number

pith:PXT3MB2C

pith:2004:PXT3MB2CRQYQ2V5MDSZLSJHRLX

not attested not anchored not stored refs pending

BL Lac evolution revisited

Anna Wolter (1), Francesca Cavallotti (1), John T. Stocke (2), Travis Rector (3) (INAF- Osservatorio Astronomico di Brera, University of Alaska), University of Colorado Boulder

arxiv:astro-ph/0404208 v1 · 2004-04-09 · 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{PXT3MB2CRQYQ2V5MDSZLSJHRLX}

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	2026-05-18T00:37:32.491811Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7de7b607428c310d57ac1cb2b924f15df2288a24441f70b4c8f17cefe819e442

Aliases

arxiv: astro-ph/0404208 · arxiv_version: astro-ph/0404208v1 · doi: 10.48550/arxiv.astro-ph/0404208 · pith_short_12: PXT3MB2CRQYQ · pith_short_16: PXT3MB2CRQYQ2V5M · pith_short_8: PXT3MB2C

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/PXT3MB2CRQYQ2V5MDSZLSJHRLX \
  | 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: 7de7b607428c310d57ac1cb2b924f15df2288a24441f70b4c8f17cefe819e442

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18789f2b738ff088e6bba1f0918b78b7a127329a185168a1792b52486a448acb",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-04-09T17:49:38Z",
    "title_canon_sha256": "cb3a1da71fc71a5caed28f14047b459547c954cd30492644adac82cc13776edd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0404208",
    "kind": "arxiv",
    "version": 1
  }
}