Pith Number

pith:DTONMY5B

pith:2026:DTONMY5BV3QMZTPCQ6CZJ7NGZC

not attested not anchored not stored refs pending

Spectral and timing variability of the transient ultraluminous X-ray source NGC 4631 X-4

Andrea Santangelo, Aysun Akyuz, Faruk Soydugan, Lorenzo Ducci, Sinan Allak, Valery Suleimanov, Wei Yu

arxiv:2606.23498 v1 · 2026-06-22 · 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{DTONMY5BV3QMZTPCQ6CZJ7NGZC}

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	2026-06-23T03:14:21.614722Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1cdcd663a1aee0cccde2878594fda6c89ccf5a17bf1cff47e92a4d3def43a8fb

Aliases

arxiv: 2606.23498 · arxiv_version: 2606.23498v1 · doi: 10.48550/arxiv.2606.23498 · pith_short_12: DTONMY5BV3QM · pith_short_16: DTONMY5BV3QMZTPC · pith_short_8: DTONMY5B

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/DTONMY5BV3QMZTPCQ6CZJ7NGZC \
  | 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: 1cdcd663a1aee0cccde2878594fda6c89ccf5a17bf1cff47e92a4d3def43a8fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b51d4bb5efba7c8c5ac1aca826d4c4acad61b4a212ba43b446a2600bc07ba9d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-06-22T15:45:50Z",
    "title_canon_sha256": "2bf7cfa4bc8cb2499c60adffe5fb427c3b4a074db7b963502fc11b68648bbf14"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.23498",
    "kind": "arxiv",
    "version": 1
  }
}