Pith Number

pith:EUNBQ4QE

pith:2026:EUNBQ4QENE5LC4BCGUAPWGH6TR

not attested not anchored not stored refs pending

Intraday Optical Variability of BL Lacertae during its Highly Active 2020-2024 Phase

Aditi Agarwal, A. Takey, Aykut Ozdonmez, B. M. Mihov, E. G. Elhosseiny, Erg\"un Ege, F. I. Elnagahy, H\"useyin Er, I. Zead, L. S. Slavcheva-Mihova, M. Emir Kenger, M. S. Rizk, Murat Tekkesinoglu, S. K. J. Pacif, W. A. Badawy

arxiv:2606.21936 v1 · 2026-06-20 · astro-ph.HE · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EUNBQ4QENE5LC4BCGUAPWGH6TR}

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	2026-06-23T02:13:03.538645Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

251a187204693ab170223500fb18fe9c7841135772f77d96f42769ef2314beb8

Aliases

arxiv: 2606.21936 · arxiv_version: 2606.21936v1 · doi: 10.48550/arxiv.2606.21936 · pith_short_12: EUNBQ4QENE5L · pith_short_16: EUNBQ4QENE5LC4BC · pith_short_8: EUNBQ4QE

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/EUNBQ4QENE5LC4BCGUAPWGH6TR \
  | 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: 251a187204693ab170223500fb18fe9c7841135772f77d96f42769ef2314beb8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "080f135b3fdbcc5a451c09f3ae8f54f351c0db78c0854cfd830bee43932d2298",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-06-20T08:08:34Z",
    "title_canon_sha256": "61e53f1060dedbc928ef82c5eb53e91f63f34b855d2fa88a36d86e9906ed7c04"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.21936",
    "kind": "arxiv",
    "version": 1
  }
}