Pith Number

pith:QFCK2BFU

pith:2016:QFCK2BFUL6ID2CWNDF27YIWB3Q

not attested not anchored not stored refs pending

Suzaku Confirms NGC~3660 is an Unabsorbed Seyfert 2

E. Rivers, G. Matt, K. Nandra, M. Brightman, S. Bianchi, Y. Ueda

arxiv:1601.02702 v1 · 2016-01-12 · 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{QFCK2BFUL6ID2CWNDF27YIWB3Q}

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	2026-05-18T01:20:32.247793Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8144ad04b45f903d0acd1975fc22c1dc3084b67aba4caa703263adc7c0b7665e

Aliases

arxiv: 1601.02702 · arxiv_version: 1601.02702v1 · doi: 10.48550/arxiv.1601.02702 · pith_short_12: QFCK2BFUL6ID · pith_short_16: QFCK2BFUL6ID2CWN · pith_short_8: QFCK2BFU

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/QFCK2BFUL6ID2CWNDF27YIWB3Q \
  | 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: 8144ad04b45f903d0acd1975fc22c1dc3084b67aba4caa703263adc7c0b7665e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e5b032929de55a5e579b13db3b2f4f79a9dabe641aa2cdb3081cce210f6fc733",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2016-01-12T00:37:28Z",
    "title_canon_sha256": "44ff81af8438932967602ea49f975d6e9576ac7c6ebe803cc3e9f1bf64971f6c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.02702",
    "kind": "arxiv",
    "version": 1
  }
}