Pith Number

pith:AUAZ5T2O

pith:2025:AUAZ5T2O7BOPR3732GG2DCM6P4

not attested not anchored not stored refs pending

Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning

Heng Wang, Liming Dou, Wenfeng Wen, Xiangru Li, Xue-Bing Wu, Yanli Ai, Yanxia Zhang, Yuming Fu, Zhiying Huo

arxiv:2501.15254 v2 · 2025-01-25 · astro-ph.GA · 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{AUAZ5T2O7BOPR3732GG2DCM6P4}

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	2026-07-05T11:03:20.742367Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

05019ecf4ef85cf8effbd18da1899e7f0ead308b96e4092442d1e3938d61f06d

Aliases

arxiv: 2501.15254 · arxiv_version: 2501.15254v2 · doi: 10.48550/arxiv.2501.15254 · pith_short_12: AUAZ5T2O7BOP · pith_short_16: AUAZ5T2O7BOPR373 · pith_short_8: AUAZ5T2O

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/AUAZ5T2O7BOPR3732GG2DCM6P4 \
  | 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: 05019ecf4ef85cf8effbd18da1899e7f0ead308b96e4092442d1e3938d61f06d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29ab1e100b6d60f9ac1b127a8c130219eb17a0c6f62e250ef53e8f6aa70b3e09",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-01-25T15:58:49Z",
    "title_canon_sha256": "22e10e720824b3ed418cd495f7c0836e302d6006e11dfa669981c609dd7a000b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.15254",
    "kind": "arxiv",
    "version": 2
  }
}