Pith Number

pith:3QPU2MXS

pith:2021:3QPU2MXSEVF3OC2IKDCVSXLLKZ

not attested not anchored not stored refs pending

Mrk 1239: a Type-2 Counterpart of Narrow-line Seyfert-1?

Chenwei Yang, Honglin Lu, Hongyan Zhou, Luming Sun, Ning Jiang, Paul S. Smith, Peng Jiang, Shaohua Zhang, Tuo Ji, Wenjuan Liu, Xiang Pan, Xiheng Shi, Xuejie Dai

arxiv:2105.13672 v1 · 2021-05-28 · 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{3QPU2MXSEVF3OC2IKDCVSXLLKZ}

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	2026-07-05T02:44:10.478133Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dc1f4d32f2254bb70b4850c5595d6b5650e33e48de1e813096320d1c7724f725

Aliases

arxiv: 2105.13672 · arxiv_version: 2105.13672v1 · doi: 10.48550/arxiv.2105.13672 · pith_short_12: 3QPU2MXSEVF3 · pith_short_16: 3QPU2MXSEVF3OC2I · pith_short_8: 3QPU2MXS

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/3QPU2MXSEVF3OC2IKDCVSXLLKZ \
  | 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: dc1f4d32f2254bb70b4850c5595d6b5650e33e48de1e813096320d1c7724f725

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2eeda98c5c81cda8c123b37bccd6b8f17276e9c96f3834ff52faa2412349304a",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-05-28T08:46:24Z",
    "title_canon_sha256": "fc4340bacc77d27e7e4205a2b4a5435b4c4ed2a23124ebaa3153be8523c44694"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.13672",
    "kind": "arxiv",
    "version": 1
  }
}