Pith Number

pith:IWR6U6WO

pith:2002:IWR6U6WOYM6WT3YMZT6LQHN5HG

not attested not anchored not stored refs pending

BL Lacertae: complex spectral variability and rapid synchrotron flare detected with BeppoSAX

A. Celotti, A. Treves, A. Wolter, C.M. Raiteri, E. Massaro, F. Montagni, F. Tavecchio, G. Ghisellini, G. Nucciarelli, G. Tagliaferri, G. Tosti, J. Noble, L. Chiappetti, L. Costamante, L. Maraschi, M. Carini, M. Nikolashvili, M. Ravasio, M. Uemura, M. Villata, O. Kurtanidze, P. Giommi, R. Nesci, S. Sclavi, T. Balonek, T. Kato

arxiv:astro-ph/0201307 v1 · 2002-01-18 · 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{IWR6U6WOYM6WT3YMZT6LQHN5HG}

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	2026-07-04T16:29:16.850219Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

45a3ea7acec33d69ef0cccfcb81dbd39be331f39dd71639b4964f64275543f3c

Aliases

arxiv: astro-ph/0201307 · arxiv_version: astro-ph/0201307v1 · doi: 10.48550/arxiv.astro-ph/0201307 · pith_short_12: IWR6U6WOYM6W · pith_short_16: IWR6U6WOYM6WT3YM · pith_short_8: IWR6U6WO

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/IWR6U6WOYM6WT3YMZT6LQHN5HG \
  | 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: 45a3ea7acec33d69ef0cccfcb81dbd39be331f39dd71639b4964f64275543f3c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c9a7d7ac1feaa7307a5047b12c7a6213dc5ec427a714edd46726371081dfb2ea",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-01-18T14:52:38Z",
    "title_canon_sha256": "1b6c0b4ec6c36043438da1f49fa25dff72a6d5c6a7004bfe1e771aae1041547d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0201307",
    "kind": "arxiv",
    "version": 1
  }
}