Pith Number

pith:QHWYU7ZK

pith:2026:QHWYU7ZKSLCNVCMDZ3JOO3CS7U

not attested not anchored not stored refs pending

PKS 2155-304: Long-Term Optical Photometric Monitoring and Variability Analysis

E. J. Marchesini, E. Jofr\'e, I. Andruchow, J. L. Weiss, J. P. Varela, L. Mammana, L. Zibecchi, R. Petrucci, S. Cellone

arxiv:2607.03420 v1 · 2026-07-03 · 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{QHWYU7ZKSLCNVCMDZ3JOO3CS7U}

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	2026-07-07T02:17:42.353203Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81ed8a7f2a92c4da8983ced2e76c52fd20567d2ec9eb067e80c0cde2b55460df

Aliases

arxiv: 2607.03420 · arxiv_version: 2607.03420v1 · doi: 10.48550/arxiv.2607.03420 · pith_short_12: QHWYU7ZKSLCN · pith_short_16: QHWYU7ZKSLCNVCMD · pith_short_8: QHWYU7ZK

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/QHWYU7ZKSLCNVCMDZ3JOO3CS7U \
  | 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: 81ed8a7f2a92c4da8983ced2e76c52fd20567d2ec9eb067e80c0cde2b55460df

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "654d3bec0f4b8356538987da51fd62faa5448dd3cea5ed37934e473d09400800",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-07-03T15:30:15Z",
    "title_canon_sha256": "85127d7c24f5885bc6a3cffc77d8b55bf300252b97de46b46f2a1b33a659ae22"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.03420",
    "kind": "arxiv",
    "version": 1
  }
}