Pith Number

pith:DDZ2UICZ

pith:2026:DDZ2UICZLOTGORL6BJD2HOP7XR

not attested not anchored not stored refs pending

The X-ray Variability of the Ultraluminous X-ray Sources in the NGC 4631 galaxy

Jianfeng Wu, Jiashun Chen, Zikun Lin

arxiv:2607.06156 v1 · 2026-07-07 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DDZ2UICZLOTGORL6BJD2HOP7XR}

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	2026-07-08T01:18:58.693891Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18f3aa20595ba667457e0a47a3b9ffbc478b56e16e93791eb4855118fa6eeefd

Aliases

arxiv: 2607.06156 · arxiv_version: 2607.06156v1 · doi: 10.48550/arxiv.2607.06156 · pith_short_12: DDZ2UICZLOTG · pith_short_16: DDZ2UICZLOTGORL6 · pith_short_8: DDZ2UICZ

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/DDZ2UICZLOTGORL6BJD2HOP7XR \
  | 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: 18f3aa20595ba667457e0a47a3b9ffbc478b56e16e93791eb4855118fa6eeefd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1be21e6383b4e3e3f360759a9bca4b5ac26b6c2726b5097b023bfacff9e3e2ef",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-07-07T11:33:19Z",
    "title_canon_sha256": "530244cbe86659d8e80c7999a7c509f6b75aa6ec09cd114e0e24e987f65ab9e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.06156",
    "kind": "arxiv",
    "version": 1
  }
}